Fix: ignore special files originating from Apple devices

[viljasenville]

Issue If .cbz archive is created on a Apple device, it may have __MACOSX folder. Files in that folder may have image extension but are actually not images files. Comic reader renders these files as corrupted pages.

For example:

• Original comic page in the archive root folder: DW_GS_001.jpg
• Corresponding resource file in the __MACOSX folder: ._DW_GS_001.jpg

Proposed fix Comic reader should ignore all files that have "__MACOSX" in the path.