New Features:
- Added a per-document settings override panel.
- Added color and thickness preset cycle keyboard shortcuts.
- New auto-switch tool for object-mode and highlighter shortcuts.
Bug Fixes and Improvements:
- Fixed the page eviction/preload thrashing issue when the user edited pages in a document with pictures inserted.
- Fixed the problem that images could sometimes fail to be copied to the .snb folder.
- Fixed the problem that undo/redo features did not work well with multiple stroke layers.