Update context menu x position

This CL changes the position of the menu button.

Fixed: 328690286
Change-Id: I351196f9d36cb2d917d0692c3b882bb53fcff19d
Reviewed-on: https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/6429847
Reviewed-by: Kateryna Prokopenko <kprokopenko@chromium.org>
Commit-Queue: Kim-Anh Tran <kimanh@chromium.org>

Author: ktran

front_end/ui/legacy/Toolbar.ts

@@ -1072,7 +1072,7 @@ export class ToolbarMenuButton extends ToolbarItem<ToolbarButton.EventTypes> {
     const contextMenu = new ContextMenu(event, {
       useSoftMenu: this.useSoftMenu,
       keepOpen: this.keepOpen,
-      x: this.element.getBoundingClientRect().left,
+      x: this.element.getBoundingClientRect().right,
       y: this.element.getBoundingClientRect().top + this.element.offsetHeight,
       // Without adding a delay, pointer events will be un-ignored too early, and a single click causes
       // the context menu to be closed and immediately re-opened on Windows (https://crbug.com/339560549).