EasyViewer-epub,Comic,Text,PDF

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- Fix file extension filter error (Thanks to William Kim)
- Fix main file list UI (Thanks to 김재민)
- Add [apply current folder thumbnail] menu (Thanks to 김재민)
Can create folder thumbnail with selected file
- Improved bookmark
Fix bookmarks selection/deletion
- Improved main window search filter
Supports multiple word searches
- Fix OneDrive (Thanks to 김현수)
- Fix file sorting algorithm (Thanks to J J)
- Fix auto-detection of webtoon mode (Thanks to 엄수연)