[FIX] web_editor: review crop attachment creation/discard

Previous implementation was wrong as it did not care about the ability
to discard a crop edition. Indeed, whenever a crop dialog was saved,
a crop attachment was created or updated at once. Discarding the editor
would then either:

- Seem to discard a first-time cropped image but would have created an
  attachment for nothing (just the image src was reset)

OR

- Fail to discard a second-time cropped image as the cropped attachment
  would have been directly updated and the image src would not have
  changed

This commit changes the way it works:

- On crop dialog save, the image is marked with required data for a
  potential future save of the cropped image (as a DB attachment) and
  the src is set to the base64 cropped image directly.

Note that the code ends up being clearer and efficient that way too.

0 files changed, 0 insertions, 0 deletions