Um... Duplicate of: https://github.com/ValveSoftware/steam-for-linux/issues/410
@m4tx Thanks for pointing to #410. As that has already been accepted as the localisation problem you reported aswell, i’ll edit that and this can be for the lack of editing what appears on the list, ok? :)
Ok :P
Should #410 be closed, then if this is superseded what remains of it?
Closing as this appears to be fixed.
(Migrated from the forums: http://steamcommunity.com/app/221410/discussions/1/882965239897600944/)
Taskbar/jumplist settings doesn't change anything for unity launcher.
Open Steam and choose Steam | Settings
Click the Interface tab
Click the Set Taskbar ... button at the bottom of the dialog
Note that all settings are enabled but not all appear on the taskbar icon (e.g. Exit Steam)
It seems that these settings are being ignored by the Linux client.