Lock tab menu items: Don't put into submenu as default

(III.) DOpus 11: suggestion: lock tab menu items: don't put into submenu as default.

I find it annoying that the lock tab menu items are
hidden in a sub menu. I guess it is possible for the user to changed this (no need to
explain), but I wanted to suggest that you may want to configure it as a default
that the lock tab items appear all directly in the tab context menu. You could simply
separate them by a line within the menu so they visually form a group. I think
a majority of users would prefer such an arrangement.