I sometimes to batch edit some, but not all tasks on a workboard column. It would be great if in the 'Batch Editor' I could click a checkbox (enabled by default) button to remove one of the tasks from from the set of tasks to be modified.
Workaround is to edit this URI:
...replace /batch/?board=X&batch= with /?ids=
Click Select All. Shift-click tasks to deselect. Click Batch Edit Selected.