bug#46827: Broken initial size of GTK3 frame

[martin rudalics]

>> display engine - the entity responsible for detecting whether a tab bar
>> line must be wrapped - can tell.  We could easily set the value of the
>> 'tab-bar-lines' parameter to that - it would make more sense than what
>> we have now.  Currently, (frame-parameter nil 'tab-bar-lines) yields "3"
>> when I have one logical tab bar line that wraps when I make the frame
>> narrow enough.
>
> I see the same.

Do we want to change it?  Then we'd probably have to change the
semantics of this for tool bar and menu bar lines too.  Note: In
practice we care only about zero or not zero here.

martin