[IMP] runbot: prevent saving on switching tab

Auto save mechanism when switching tab is unwanted in runbot, most of
the time we will use other tabs to get the data necessary for the record
we are modifying/creating and we don't care about saving yet.
We also prevent closing the window if the record is dirty.
Auto save in pager and context switch is still kept.

runbot/__manifest__.py

@@ -64,6 +64,7 @@
     'assets': {
         'web.assets_backend': [
             'runbot/static/src/libs/diff_match_patch/diff_match_patch.js',
+            'runbot/static/src/js/views/**/*',
             'runbot/static/src/js/fields/*',
         ],
         'runbot.assets_frontend': [

runbot/static/src/js/views/form_controller.js

@@ -0,0 +1,19 @@
+/** @odoo-module **/
+
+import { FormController } from '@web/views/form/form_controller';
+import { patch } from '@web/core/utils/patch';
+
+
+patch(FormController.prototype, {
+    // Prevent saving on tab switching
+    beforeVisibilityChange: () => {},
+    // Prevent closing page with dirty fields
+    async beforeUnload(ev) {
+        if (await this.model.root.isDirty()) {
+            ev.preventDefault();
+            ev.returnValue = 'Unsaved changes';
+        } else {
+            super.beforeUnload(ev);
+        }
+    }
+})