Fix message log dock causes havoc with other docks placed in the same area

[nyalldawson]

Fixes #31955, fixes #27868, fixes #39171

[rduivenvoorde]

Thanks @nyalldawson! Build and tested.

One minor visual issue: the little bubble button becomes active/nonactive if you click it it self.
But if you use the contextmenu to show/hide the log messages panel, the bubble button active state is not updated...
I can live with it :-) But thought to let know.

[rduivenvoorde]

Nice headtrick by the way: closing 3 issues \o/

[nyalldawson]

@rduivenvoorde I can't reproduce that -- could you share a screencast?

[rduivenvoorde]

More info (my screencast plugin just broke...):
it is because if you use the context menu to hide/show the Log Messages, it does NOT get focus.
And the little balloon button is only 'active' if the actual Log Messages TAB is in focus.
Difference is that with the balloonbutton you show the messages AND it get's focus
with context menu you only add the messages to the tab list but (in my case) the Temporal Controller stays in focus
This more clear?

[nyalldawson]

Which context menu are you using?

[rduivenvoorde]

Right click in empty place of toolbar (to enable Panels and Toolbars)