Task Editor: Batch processing improvements

[sauterl]

Currently, the batch processing of targets in the new editor was removed. Previous functionality included a textfield to add line-by-line multiple targets (identified by their name) and a grid view where image targets where displayed by default.

It is desirable to re-add this functionality:

• Add Batch-Add of targets in some form
• Add Grid view / view where targets are rendered automatically in addition to the current list view that displays targets on demand