Would be great if you could right click on an item in any toolbar and the first thing listed is "remove" - instead of having to go down to "visible items" and then find the item, then uncheck it.
Sorry, IMHO I don't see this as especially helpful GUI addition.
The UI provides for tweaking things in a rational and deliberate fashion with quick changes done with the "Visible Buttons" split menu, and more involved changes via the Customize Toolbar--including the important ability to reset to defaults.
Believe, the "Visible Buttons" being grouped with other toolbar controls and positioned the same for all toolbars is intentional and brings consistency to the UI.
Dock All Toolbars
Lock Toolbar Position
While it might seem helpful, believe placing a configuration button alone at the top of the menu would cause confusion and a poor UX. Placing a "Remove" button so prominently on the context menu of all toolbars, "What is receiving the action of the remove?".
Rather, things are more deliberate, Toolbars are stateful (retained in user profile), and are intended to be "customized" to a users liking -- but with guidance.
The Visible Buttons manipulate just the default buttons normally associated with the toolbar. While the Customize Toolbar offers more ambitious changes for adding widgets and modifying toolbar defaults. And of course offers recovery by "restoring" defaults without having to clobber ones profile.
Just don't see much benefit to implementing a Remove button, as things now are pretty good.
Have thought about suggesting the same thing, though i thought a different context menu would appear when over a toolbar item, but i'd assume a user would likely want to remove multiple entries, and likely add multiple ones as well, so opening the customize dialog is the best means of completing this task.
But i hope with the amount of improvements i've made to the toolbars, most users would never want to remove entries. ;D
We're replacing our use of the 'ux-advise' component with a keyword:
Component -> LibreOffice
Add Keyword: needsUXEval
Following Stuart's comment 1, I close the request as WFM. (Tool-)buttons do not have a right click handler making such a feature very special, the danger of unintentionally activation is high, we have a good quick access with the current dropdown menu, and last but not least the future is the Notebookbar.