Allow movement/deletion of existing captured tokens

[spetzel2020]

Currently you can't see where the existing captured tokens are without pressing Run Quick Encounter Also you can't adjust the positions of captured tokens without deleting ALL the existing ones (by zeroing the Actor) and then re-adding them

Instead: when the QE dialog opens, when you click/hover over an existing Actor with captured tokens:

• show the token position as TEMPORARY tokens on the map - allow them to be moved or deleted

When you Save the Quick Encounter, the final positions are captured.