First of all, I really appreciate the work done on ZK, so see the following just as minor remarks. Maybe someone with a GitHub account can make tickets for those. The first one is most important to me.
(1) Closing the F10 menu unpauses the game automatically in SP. I would prefer to have only manual pausing/unpausing. Formerly, there has been an option for that..
(2) The unit menu's position can only be changed if no units are selected. If you don't know that, this can be quite frustrating because you have to select units to see the unit menu while you are not in LuaUI TweakMode. In LuaUI TweakMode, it should be possible to change the positions of all GUI panels independent of their state.
(3) The volume bar scales incorrectly in Y-direction when changing its GUI panel size.