Custom attribute type in RAM
Is there a way to create a list where pre-entered selections can be added/removed? Currently I'm using the type Text with "multi-select" and "use preset values" checked. The problem is that if someone updating this field wishes to add another item from the preset values list, they must remember to hold down CTRL while selecting the new item or else other selections are deselected.
I'm thinking maybe there's a way to define custom attribute type where two text boxes are presented, one contains all the items you want, the other one is selected box which is empty. You select the items you want on one side and click "Add" and it will populate the other box.