Bug fixes for v0.10.1.

Bug fixes

• Custom download locations on external SD card not working
• Issue when chapters list includes multiple chapters that point to the same URL
• Source not appearing as pinned when in last used section
• Icons being invisible in History when using light blue theme
• Crash when collapsing filter groups

Minor changes

• Error/warning notifications for downloader separated out into separate notification channel
• Improved download badge contrast