I want Alt+Character hotkeys always to be underlined in LibreOffice under KDE (OpenSuse Leap 15.1).
I have configured the GUI theme with "Always show accelerators", but LibreOffice seems to ignore this setting.
I also tried changing "Gnome Application Style" to something other than "Breeze" and restarting LibreOffice,
but it didn't seem to affect the applications at all*. Also, none of the styles available for GTK3 seem to support underlining accelerators (only oxygen-gtk for GTK2).
* Changing the GTK3 style and restarting LibreOffice now works after all. I don't know why it didn't work when I last tried.