Xournal++ v1.3.3

This is a new patch version of Xournal++ with bug fixes and improvements from the community.

• Fix undo/redo crash with automatic page insertion
• Silent errors when parsing some files are no longer silent
• Fix more UTF-8 conversion issues
• Report failure to open recent files
• Fix rendering of single-dot strokes
• Fix horizontal alignment of pages
• Fix toolbar item "Draw line" being wrongly enabled
• Improve zoom/scroll responsivity
• Updated translations

See https://github.com/xournalpp/xournalpp/blob/v1.3.3/CHANGELOG.md for a more detailled list of changes.