[FIX] web_responsive: Allow searching apps in mobile Chrome

This patch fixes #1251.

The keydown event is faked in mobile chrome because it's not something reliable due to today's virtual keyboards prediction features. Typing a <kbd>C</kbd> character doesn't mean it will be there when user uses autocorrection/autoguessing.

Instead of that, we use now the `keydown` event exclusively for movement features, and `input` event exclusively for content changes in the search input element.

Apart from fixing search in mobile Chrome, it also makes code more readable.

The search input also disables autocompletion since it would be useless and annoying here.

web_responsive/static/src/js/web_responsive.js

@@ -72,6 +72,7 @@ odoo.define('web_responsive', function (require) {
     AppsMenu.include({
         events: _.extend({
             "keydown .search-input input": "_searchResultsNavigate",
+            "input .search-input input": "_searchMenusSchedule",
             "click .o-menu-search-result": "_searchResultChosen",
             "shown.bs.dropdown": "_searchFocus",
             "hidden.bs.dropdown": "_searchReset",
@@ -217,17 +218,15 @@ odoo.define('web_responsive', function (require) {
          * @param {jQuery.Event} event
          */
         _searchResultsNavigate: function (event) {
-            // Exit soon when not navigating results
-            if (this.$search_results.html().trim() === "") {
-                // Just in case it is the 1st search
-                this._searchMenusSchedule();
-                return;
-            }
             // Find current results and active element (1st by default)
             var all = this.$search_results.find(".o-menu-search-result"),
                 pre_focused = all.filter(".active") || $(all[0]),
                 offset = all.index(pre_focused),
                 key = event.key;
+            // Keyboard navigation only supports search results
+            if (!all.length) {
+                return;
+            }
             // Transform tab presses in arrow presses
             if (key === "Tab") {
                 event.preventDefault();
@@ -245,12 +244,8 @@ odoo.define('web_responsive', function (require) {
             case "ArrowDown":
                 offset++;
                 break;
-            // Other keys trigger a search
             default:
-                // All keys that write a character have length 1
-                if (key.length === 1 || key === "Backspace") {
-                    this._searchMenusSchedule();
-                }
+                // Other keys are useless in this event
                 return;
             }
             // Allow looping on results

web_responsive/static/src/xml/apps.xml

@@ -30,6 +30,7 @@
                             </div>
                         </div>
                         <input type="search"
+                               autocomplete="off"
                                placeholder="Search menus..."
                                class="form-control"/>
                     </div>