QuickMagic step 3: fix "edit column" popup; make columns read-only or not as needed
Merge branch 'master' into menubar
QuickMagic step 3: fix some more column settings problems in drop-down-menus
QuickMagic step 3: significant functionality towards selecting a bunch of in a column
QuickMagic step 3: full implementation for 2 methods of selecting and batch editing (meta/cmd key and shift key), but only for drop-down menus