[IMP] purchase: Rename pages titles

Purpose
=======

Change “How-To” to specific actions.

purchase/purchases/master/import.rst

@@ -1,6 +1,6 @@
-==================================
+==========================
-How to import supplier pricelists?
+Import supplier pricelists
-==================================
+==========================
 
 Introduction
 ============

purchase/purchases/master/suppliers.rst

@@ -1,6 +1,6 @@
-==========================================
+==================================
-How to set several suppliers on a product?
+Set several suppliers on a product
-==========================================
+==================================
 
 Keeping track of your vendors can be a real burden in day-to-day
 business life. Prices can change and you might have several suppliers

purchase/purchases/master/uom.rst

@@ -1,6 +1,6 @@
-=========================================================
+=================================================
-How to purchase in different unit of measures than sales?
+Purchase in different unit of measures than sales
-=========================================================
+=================================================
 
 In day-to-day business, it may happen that your supplier uses a
 different unit of measure than you do in sales. This can cause confusion

purchase/purchases/rfq.rst

@@ -1,6 +1,6 @@
-==========================================
+=========================================
-Request for Quotations and Purchase Orders
+Request for Quotation and Purchase Orders
-==========================================
+=========================================
 
 .. toctree::
    :titlesonly:

purchase/purchases/rfq/3_way_matching.rst

@@ -1,6 +1,6 @@
-=================================================================
+==========================================================
-How to determine if a vendor bill should be paid (3-way matching)
+Determine if a vendor bill should be paid (3-way matching)
-=================================================================
+==========================================================
 
 In some industries, you may receive a bill from a vendor before
 receiving the ordered products. However, the bill should maybe not be

purchase/purchases/rfq/analyze.rst

@@ -1,6 +1,6 @@
-=============================================
+=====================================
-How to analyze the performance of my vendors?
+Analyze the performance of my vendors
-=============================================
+=====================================
 
 If your company regularly buys products from several suppliers, it would
 be useful to get statistics on your purchases. There are several reasons

purchase/purchases/rfq/approvals.rst

@@ -1,6 +1,6 @@
-========================================================
+================================================
-How to setup two levels of approval for purchase orders?
+Setup two levels of approval for purchase orders
-========================================================
+================================================
 
 Two level approval setup
 ========================

purchase/purchases/rfq/bills.rst

@@ -1,6 +1,6 @@
-==============================
+======================
-How to control supplier bills?
+Control supplier bills
-==============================
+======================
 
 The **Purchase** application allows you to manage your purchase orders,
 incoming products, and vendor bills all seamlessly in one place.

purchase/purchases/rfq/cancel.rst

@@ -1,6 +1,6 @@
-================================
+=======================
-How to cancel a purchase order?
+Cancel a purchase order
-================================
+=======================
 
 Due to misunderstandings, human errors or change of plans, it is
 sometimes necessary to cancel purchase orders sent to suppliers. Odoo

purchase/purchases/rfq/create.rst

@@ -1,6 +1,6 @@
-======================================
+==============================
-How to create a Request for Quotation?
+Create a Request for Quotation
-======================================
+==============================
 
 A Request for Quotation (RfQ) is used when you plan to purchase some
 products and you would like to receive a quote for those products. In

purchase/purchases/rfq/reception.rst

@@ -1,6 +1,6 @@
-=======================================================
+===============================================
-How to control product received? (entirely & partially)
+Control product received (entirely & partially)
-=======================================================
+===============================================
 
 The **Purchase** app allows you to manage your purchase orders, to control
 products to receive and to control supplier bills.

purchase/purchases/tender/manage_multiple_offers.rst

@@ -1,6 +1,6 @@
-==============================
+=======================
-How to manage Purchase Tenders
+Manage Purchase Tenders
-==============================
+=======================
 
 A **Purchase Tender** (PT), also known as Call for Bids, is used to
 drive competition between several suppliers in order to get the best

purchase/purchases/tender/partial_purchase.rst

@@ -1,6 +1,6 @@
-=======================================================================
+===============================================================
-How to purchase partially at two vendors for the same purchase tenders?
+Purchase partially at two vendors for the same purchase tenders
-=======================================================================
+===============================================================
 
 For some Purchase Tenders (PT), you might sometimes want to be able to
 select only a part of some of the offers you received. In Odoo, this is

purchase/replenishment/flows/compute_date.rst

@@ -1,6 +1,6 @@
-====================================================
+===================================================
-How are the order date and scheduled dates computed?
+How are the order date and scheduled dates computed
-====================================================
+===================================================
 
 Scheduled dates are computed in order to be able to plan deliveries,
 receptions and so on. Depending on the habits of your company, Odoo

purchase/replenishment/flows/dropshipping.rst

@@ -1,6 +1,6 @@
-===========================
+===================
-How to setup drop-shipping?
+Setup drop-shipping
-===========================
+===================
 
 Overview
 ========

purchase/replenishment/flows/purchase_triggering.rst

@@ -1,6 +1,6 @@
-=======================================================
+===============================================
-How to trigger the purchase of products based on sales?
+Trigger the purchase of products based on sales
-=======================================================
+===============================================
 
 Overview
 ========

purchase/replenishment/flows/setup_stock_rule.rst

@@ -1,6 +1,6 @@
-==================================
+==========================
-How to setup a minimum stock rule?
+Setup a minimum stock rule
-==================================
+==========================
 
 For some items you hold in stock, it might be useful to have rules
 making sure you never run out of stocks (for example, products with a

purchase/replenishment/flows/warning_triggering.rst

@@ -1,6 +1,6 @@
-==============================================================
+======================================================
-How to trigger a warning when purchasing at a specific vendor?
+Trigger a warning when purchasing at a specific vendor
-==============================================================
+======================================================
 
 Overview
 ========