[chaley]

V4.2.5:

• Add "Clear default reader app" to book details menu
• Optionally write covers to a file when a book is read (CC / Other settings). This is useful for standby screens on some e-ink devices and for people who want to set wallpaper or the lock screen background to the cover image.

V4.2.5a:

• Replace the new "Clear default reader app" added to the book details menu (above) with "Open book with ...". This command opens the reader app selection dialog even if a default has already been chosen.
• Fix white-on-white text in wireless device progress dialogs on e-ink devices

V4.2.5b:

• Verify that the file for storing a cover image has extension "jpg" or "png"
• Updated languages: German, Russian, Spanish
• [BUGFIX]Fix "Something has gone wrong" returning from Cloud Settings
• [BUGFIX]Fix crash if cloud provider is changed from cloud book details