[IMP] spreadsheet[_dashboard]: delete relation filter values using backspace key

This commit implements the functionality of using backspace key to
delete values in relation filter.

task 3324738

closes odoo/odoo#121513

Signed-off-by: Lucas Lefèvre (lul) <lul@odoo.com>

addons/spreadsheet/static/src/global_filters/components/records_selector/records_selector.js

@@ -27,6 +27,15 @@ export class RecordsSelector extends Component {
         }));
     }
 
+    onKeydown(ev) {
+        if (this.props.resIds.length === 0) {
+            return;
+        }
+        if (ev.key.toUpperCase() === "BACKSPACE") {
+            this.removeRecord(this.props.resIds[this.props.resIds.length - 1]);
+        }
+    }
+
     searchDomain() {
         return Domain.not([["id", "in", this.props.resIds]]).toList();
     }

addons/spreadsheet/static/src/global_filters/components/records_selector/records_selector.xml

@@ -3,7 +3,9 @@
     <div t-name="spreadsheet.RecordsSelector" class="o_field_widget o_field_many2many_tags" owl="1">
         <div class="o_field_tags d-inline-flex flex-wrap mw-100 o_tags_input o_input">
             <TagsList tags="tags"/>
-            <div class="o_field_many2many_selection d-inline-flex w-100">
+            <div 
+                class="o_field_many2many_selection d-inline-flex w-100"
+                t-on-keydown="onKeydown">
                 <Many2XAutocomplete
                     placeholder="props.placeholder"
                     resModel="props.resModel"