Stop propagation of |get-info| command when caught

Currently when the |get-info| command is caught by an element, the event
continues to propagate, which causes |display_| to be called twice in
some cases.

Fix this: stop propagation of the event when handled.  No change in
behavior, no new tests.

Bug: 1044448
Change-Id: I670bb872b414f18265cb68688d704ab4c0088976
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2026532Reviewed-by: Noel Gordon <noel@chromium.org>
Commit-Queue: Noel Gordon <noel@chromium.org>
Cr-Commit-Position: refs/heads/master@{#736263}

ui/file_manager/file_manager/foreground/js/quick_view_controller.js

@@ -86,16 +86,19 @@ class QuickViewController {
       // Selection menu command can be triggered with focus outside of file list
       // or button e.g.: from the directory tree.
       if (event.command.id === 'get-info') {
+        event.stopPropagation();
         this.display_(QuickViewUma.WayToOpen.SELECTION_MENU);
       }
     });
     this.listContainer_.element.addEventListener('command', event => {
       if (event.command.id === 'get-info') {
+        event.stopPropagation();
         this.display_(QuickViewUma.WayToOpen.CONTEXT_MENU);
       }
     });
     selectionMenuButton.addEventListener('command', event => {
       if (event.command.id === 'get-info') {
+        event.stopPropagation();
         this.display_(QuickViewUma.WayToOpen.SELECTION_MENU);
       }
     });