Modify Table View breaks (won't allow deselection and re-add of unlocked fields).
Description of the issue
If you create a table with a lot of fields (for test I copy/pasted 800 fields) in a brand new file, FM will produce the original form view. You can switch to table view and FM will automatically only display the max number of fields which will fit within the layout size limit (approx 1750 px). FM will also display those same fields in the Modify table view. If you uncheck many of those fields (go ahead and uncheck all but 10) and then select the + button (and add new field) then say OK, those new fields will NOT be added to the layout. For it to break you must start with max + number of fields then uncheck many of them and attempt to re-add different fields.