This is a follow-up from bug#68334 where there was interest in adding 
support into Emacs core for tool bars in windows. 
(https://debbugs.gnu.org/cgi/bugreport.cgi?bug=68334#52)  I have 
attached three changes I authored to accomplish this, two small changes 
to tool-bar and tab-line, and then a code drop of my window-tool-bar.el 
package.  I have not yet put in documentation in NEWS or the manual 
about window-tool-bar and was hoping to get a code review done first.

I think it would be good to have window-tool-bar.el also be a package so 
that I can keep supporting Emacs 29 as well.  I am happy to have this 
put on GNU ELPA and would appreciate help in getting that completed.

I am open to renaming the package and public functions if that's 
desired.  I like the name "window-tool-bar-mode" as it clearly relates 
to tool-bar-mode.

After these patches are accepted, I'd also like to clean up the existing 
tool bar maps for built in minor modes.  This would allow me to address 
Eli's request to have a usable tool bar for M-x gdb 
(https://debbugs.gnu.org/cgi/bugreport.cgi?bug=68334#23).

For tracking purposes, I signed copyright paperwork back in 2020, so 
that shouldn't be an issue.  Thanks.

   -- MJF