Release 49.0

• Only prevent from saving if there are severe errors
  
• Make translation panel resizable
  
• Use static links for app screenshots in app metadata
  
• Require meson 1.7
  
• Allow updating PO files with an updated POT template
  
• Improve "Upload" dialog
  
• Plug some memory leaks
  
• Ask for D-L authentication token during initial setup
  
• Update some translations