Annotation - select range of track with shortcut keys

[ShrimpCryptid]

Use Case

Requested by @SergeEParent! Scientists want to be able to label ranges of a track

Acceptance Criteria

• In annotation edit mode, holding shift will select a range of objects in a track from last time it was selected to the current frame.
  • The flow would work like: Select a cell in a track on a certain frame, then jump forward by some number of frames, hold shift, and click the same track again.
• A popup should appear when hovering over the new cell ("Select track {T} from frame {T0} to frame {T1}").

Details

• Store the last object that a label was applied to (null if a label was last removed from an object).
• Check if the currently hovered object and the last object have the same track ID.