add ESC key event handler in apps view to clear filter

dashboard/src/views/AppsView.vue

@@ -261,6 +261,10 @@ function setItemWidth() {
   else itemWidth.value = '190px';
 }
 
+function onKeyDownHandler(event) {
+  if (event.key === 'Escape') filter.value = '';
+}
+
 onActivated(async () => {
   setItemWidth();
 
@@ -279,11 +283,13 @@ onActivated(async () => {
   refreshInterval = setInterval(refreshApps, 5000);
 
   window.addEventListener('resize', setItemWidth);
+  window.addEventListener('keydown', onKeyDownHandler);
 });
 
 onDeactivated(() => {
   filter.value = '';
 
+  window.removeEventListener('keydown', onKeyDownHandler);
   clearInterval(refreshInterval);
 });