Before this commit:
- Edit mode, open image dialog
- Upload an image to the media dialog
- Reclick on Upload but don't select an image, close the browser image
selector
- This will trigger the input change event, as the input was emptied
This is needed since in later commit, `_addData()` will do some code outside
of the `files` loop, which is useless if there is no files selected.
In thise case, the issue would be that it would open an empty toastr.
task-2345082
Coming from #65828Closes#68326closesodoo/odoo#68340
X-original-commit: 94c45412714c1263788b2567ce3c9581453b2cd4
Signed-off-by: Quentin Smetz (qsm) <qsm@odoo.com>