>> Also please eval these calls and show their return values.
>
> 1. (mu4e--modeline-string) :
>
> #(" 🌀0/0 " 1 2 (help-echo "mu4e favorite bookmark 'Unread messages':
Thanks for the reproducible test case.
The problem is that the mode-line keymap can't be used without
replacing the symbol 'mode-line' with 'tab-bar'. This means that
this recipe doesn't work:
```elisp
(defun mu4e--modeline-string ()
#(" 🌀0/0 "
0 5 (help-echo "mu4e favorite bookmark"
mouse-face mode-line-highlight
keymap (mode-line . (keymap (mouse-1 . mu4e-jump-to-favorite)
(mouse-2 . mu4e-jump-to-favorite)
(mouse-3 . mu4e-jump-to-favorite))))))
(add-to-list 'global-mode-string '(:eval (mu4e--modeline-string)) t)
(defun mu4e-jump-to-favorite ()
(interactive)
(message "DONE"))
(setopt tab-bar-format (append tab-bar-format '(tab-bar-format-align-right
tab-bar-format-global)))
(tab-bar-mode)
```
But after remapping the symbol 'mode-line' with 'tab-bar',
it works nicely:
```elisp
(defun mu4e--modeline-string ()
#(" 🌀0/0 "
0 5 (help-echo "mu4e favorite bookmark"
mouse-face mode-line-highlight
keymap (keymap (tab-bar . (keymap (mouse-1 . mu4e-jump-to-favorite)
(mouse-2 . mu4e-jump-to-favorite)
(mouse-3 . mu4e-jump-to-favorite)))))))
```
