bug#51558: Long mode-line-compact breaks tab-line tabs

[Juri Linkov]

0. emacs -Q
1. (setq mode-line-compact 'long)
2. (global-tab-line-mode)
3. Visit more buffers in the same window
4. Click on a non-first tab on the tab-line
5. It always selects the first tab only

The click event returns a string that contains all tabs,
whereas with the default value of mode-line-compact
the event correctly contains only one tab's string.

I don't know why mode-line-compact affects the tab-line,
but maybe it should have a condition to not apply to the tab-line?