Split tools into two sets: default and additional. Default tools cannot be removed from the toolbar. Add Close context menu to non-default panel toolbar items.
Created attachment 195511 [details] Patch
Please provide a screenshot.
Comment on attachment 195511 [details] Patch Clearing r? while waiting for the screenshot.
Created attachment 195543 [details] screenshot of tools menu
Created attachment 195544 [details] screenshot of context menu
Comment on attachment 195511 [details] Patch We would probably want close all and close to the right...
Closing as invalid, as this bug pertains to the old inspector UI and/or its tests. Please file a new bug (https://www.webkit.org/new-inspector-bug) if the bug/feature/issue is still relevant to WebKit trunk.