Release 2.2.2

• Fixed the panel was "behind" the system navigation bar in the latest Android APIs (API35, API36, …)
• Fixed bug causing all pages to be loaded on startup (slow loading)
• Fixed bug with double-byte characters not showing correctly in file names
• Optimized reverse (RTL) swiping to reuse the stored page count
• Added total_pages column with DB migration to version 5 (no data loss on upgrade)
• Other minor improvements