message: set aliases so they match the icon names in the code
diff: <file>clone@2x.png</file>
  <file>cloud.png</file>
  <file>cloud@2x.png</file>
  - <file>screenshots/main_dark.png</file>
  - <file>screenshots/main_dark@2x.png</file>
  + <file alias="dark.png">screenshots/main_dark.png</file>
  + <file alias="dark@2x.png">screenshots/main_dark@2x.png</file>
  <file>diff.png</file>
  <file>diff@2x.png</file>
  <file>editor.png</file>
  <file>lfs@2x.png</file>
  <file>logo-type.png</file>
  <file>logo-type@2x.png</file>
  - <file>screenshots/main_native.png</file>
  - <file>screenshots/main_native@2x.png</file>
  + <file alias="native.png">screenshots/main_native.png</file>
  + <file alias="native@2x.png">screenshots/main_native@2x.png</file>
  <file>new.png</file>
  <file>new@2x.png</file>
  <file>open.png</file>
  <file>submodules.png</file>
  <file>submodules@2x.png</file>
  <file>sunken.png</file>
  - <file>screenshots/main_split.png</file>
  + <file alias="system.png">screenshots/main_split.png</file>
  <file>terminal.png</file>
  <file>terminal@2x.png</file>
  <file>tools.png</file>
  