Tiger 0.3

[agersant]

• [x] Cap undo history at 100 entries
• [x] Offer to save when closing individual documents
• [x] Error dialogs
• [x] Handle save errors while performing a save on exit
• [x] Dependencies update
• [x] Remove placeholder app icon
• [x] Get rid of failure crate
• [x] Move hitbox data from frames to animation frames
• [x] Editing hitboxes while animation is in workbench
  • [x] Hitboxes can be created and moved while an animation is in the workbench
  • [x] When multiple hitboxes and the animation frame are overlapping, mouse hovers and clicks should only interact with one of them
  • [x] Hitboxes panel is renamed to Keyframe and allows selecting the animation frame
  • [x] Keyframe panel can lock individual keyframes, or the animation frame, to prevent mouse interactions
  • [x] Keyframe panel can link/unlink hitboxes to the animation frame so that moving the frame also moves them (default on)
• [x] Fix bug where hitbox resize handles don't work when clicked where they overlap with the corresponding hitbox
• [x] Auto-select new keyframes when inserted to timeline
• [x] Multiple selections
• [x] Jump to next/previous frame
• [x] Auto reload images on frame edit