- define some custom favorite toolbars
- RMB to "Lock toolbars"
- RMB customize action toolbars
- click "Show captions"
-> "Lock toolbars" gets unselected

II. favorite toolbars position changes, although "Lock toolbars" is selected
- define some custom favorite toolbars
- place them with some space in between
- RMB to lock toolbars
- restart FC
-> toolsbars are aligned to each other, space in between is gone

