Remove tabindex from filter remove button (#8919)

Filters can already be removed via backspace
Removing the tabindex ensures the search input is focused by default instead

src/components/views/dialogs/spotlight/SpotlightDialog.tsx

@@ -1023,6 +1023,7 @@ const SpotlightDialog: React.FC<IProps> = ({ initialText = "", initialFilter = n
                     })}>
                         <span>{ filterToLabel(filter) }</span>
                         <AccessibleButton
+                            tabIndex={-1}
                             alt={_t("Remove search filter for %(filter)s", {
                                 filter: filterToLabel(filter),
                             })}