I need to mount a screen where I drag options from one list to another. However, when loading from the first to the second, only one copy should be created for the second list.
When the user performs the reverse process (load from list 2 to list 1) he should exclude from list 2 and do nothing on list 1.
Kendo gives me the following example, but I can not adjust it. For every time I move the options from side to side the first list loses elements.
Thank you!