#31 Changing multiple romdata entries properties

[TonyWoode]

A powerful feature is the ability to multiply select many roms and change properties - this appears to work well for some fields and for dropdown changes, however under certain cirumstances this can result in a text change (a) shifting to another field (b) shifting to another field and turning into garbage usually an int (c) doing nothing (d) altering all selected entries in that column to the string "unchanged"