Show error if the image isn't saved to photos, usually due to permissions not being allowed
Merge commit '6e3272b4a732a2065dfba4f90d1246748510e01b'

# By Andrew Yates
# Via Andrew Yates
* commit '6e3272b4a732a2065dfba4f90d1246748510e01b':
  Show error if the image isn't saved to photos, usually due to permissions not being allowed
REFACTORING: simplified photo sharer

- got rid of custom error message as it would have to be translated to all languages - hopefully from this point of view the generic builtin message is fine
- simplified positive callback, as ActivityIndicator UI should be always called by the delegate