Issue #109: Confirming Actions Prevents Context Hiding

This commit fixes Issue #109, where confirming an action in the action editor would prevent changes to what actions should be context-hidden. Tested and working on my machine.

The .confirm() method of the actionEditor did not change specific attributes of the row, but set the row equal to a new object. This made the entry in the trial data refer to a different object than frame_data in populateFrameRow, which broke the check against frame_data for the frame's merge state.

The fix is simple - only change the attributes that need changing, which won't break any variable bindings.