Xournal++ v1.3.5

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

• Fixed crash when exiting after playing sound
• Fixed some button-to-tools configuration issues
• Fixed crash involving page background selection
• Added multidevice support for X11 palm rejection
• Reduced PDF cache retention for off-screen pages
• Fixed moving display when selecting "Fit to Screen"
• Fixed disabled "Merge layer" menu entry
• Fixed a concurrency crash when using layers
• Improved setting up environment on MacOS
• Fixed typos in some displayed strings
• Fixed "Missing background" display when missing PDF page
• Bumped dependency versions on MacOS and Windows
• Added Georgian translations
• Updated translations

See https://github.com/xournalpp/xournalpp/blob/v1.3.5/CHANGELOG.md for a more detailled list of changes.