Test feedback

[praksharma]

• A "last modified" column for each entry. Very useful to keep track of the labelled shots.

• An undo button or ctrl + z would be very helpful. Sam told me this might be difficult to implement.
• The signal overview pane is missing x-axis ticks or at least the L-bound and U-bound.

• Y-axis limits are changing in the bottom signal overview pane depending on the window size. Meaning a narrow view window hides parts of the original signal.