bug#48069: 28.0.50; [feature/pgtk]; tooltips are jittery and sometimes obscured

[Eli Zaretskii]

> Date: Tue, 04 May 2021 16:23:51 +0900 (JST)
> From: Yuuki Harano <masm+emacs@masm11.me>
> Cc: 48069@debbugs.gnu.org
> 
> Tooltips in emacs are written always for main windows, not menu windows,
> and compositor thinks that stacking order should be:
> 
> (above)
> - menu
> - tooltip for main window
> - main window
> (below)
> 
> It is too hard to improve it...

Does that mean tooltips will not work well in the pgtk build?  That
would be a shame, I think.  Can we somehow work around this
peculiarity, so that tooltips for menus and tool-bar buttons work as
they do in the other builds?

Thanks.