• Wallhaven: correctly set aspect ratio in search query
• Reset the refresh timer after a manual refresh
• Wallhaven: refresh wallpaper when preferences change
• Refresh wallpaper preview only when a preview is available
• Set active source by selecting the row in the source list
• NASA: rename row title to "NASA Astronomy"
• Sort source list alphabetically
• Add a setting to disable automatic refresh
• Improve support for a default "no source" application state
• Fix preview image dimensions
• Remove the "manual" source (disable automatic refresh instead)
• NASA: replace user-defined API key with a value supplied at compilation
• Unsplash: replace user-defined API key with a value supplied at compilation
• Wallhaven: add explanatory text for the API key field
• EarthView: update photo source
• Slideshow: allow any image type when filtering files

Translation Updates:

• Updated Arabic
• Updated Dutch
• Added Spanish
• Added Finnish
• Updated French
• Updated Russian
• Updated Turkish
• Added Bulgarian