Devtools: Context Menu Improvement for Application Tool StorageItemsView

This change removes a context menu from StorageItemsView.js that was
overriding the context menues for any of the Widgets used in the
Local/Session Storage and Cookies Views in the Application Tool.
The overriding menu would only give the option to "Refresh" and was
hiding other options such as edit/delete in the tables and the basic
input context menu (copy/paste/etc) for the filter in the toolbar.

The refresh option is now restricted to context menu of the data grid
along-side the other options.

before: https://imgur.com/RiNssOQ

after: https://imgur.com/oQV1Sde

Bug: 963183
Change-Id: Icd26c09006bdf96acbde16096c17c6887a14bc42
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1659489
Reviewed-by: Joel Einbinder <einbinder@chromium.org>
Commit-Queue: Brandon Goddard <brgoddar@microsoft.com>
Cr-Commit-Position: refs/heads/master@{#672319}
2 files changed