Subject: Tool bar item doesn't align to the right edge

From: Juri Linkov <[email-masked]>
Date: Mon, 14 Sep 2020 22:18:33 +0300

This bug report is from emacs-devel thread:

>> Anyway, there is a bug in tool-bar code that doesn't allow to use
>> align-to, whereas align-to works perfectly when used on the tab-bar.
>> 
>> Here is the test case to reproduce the bug on the tool-bar:
>> 
>> emacs -Q and eval:
>> 
>>   (define-key-after (default-value 'tool-bar-map) [global-menu-bar]
>>     `(menu-item (propertize " " 'display '(space :align-to (- right 5)))
>>                 (lambda ()
>>                   (interactive)
>>                   (popup-menu (mouse-menu-bar-map)))
>>                 :image ,(tool-bar--image-expression "newsticker/narrow")
>>                 :help "Pop up the global menu bar"))
>>   (force-mode-line-update)
>> 
>> It doesn't align the icon to the right edge of the tool-bar
>> whereas the same code aligns it on the tab-bar.
>
> Here, the above displays nothing at all on the tool bar.

The icon is displayed only after more changes in window-configuration like
switching buffers, i.e. force-mode-line-update (copied from tool-bar-local-item)
has no effect.

Another bug?  Or should this code use both (redraw-display) and
(force-mode-line-update) like in bug#43397?