Add Files Drag and Drop Behaviour

[StephenAdams-hamont]

From the Upload Photos menu if I drag files into the "Drag files here" area that are of a type that are not included in the "Allowed file types" I will receive a notification that the file is not allowed and I will be returned to the upload photos menu. From all observations the file add process was aborted, however if I then add any allowed file I will see that all the elements up to the point where the original upload attempt was aborted will be queued.

1. Either the queue should have been emptied so that the display is correct or the display should have been updated to indicate the partial completion of the command.
2. Since this can be used, and is useful for, importing from nested folders, I would suggest that the error message should appear at the end of processing, however during the importing all valid files will be added to the queue, invalid ones will be ignored except to note them in the error message. Sample use case: nested folders with many Thumbs.db files that we wish to ignore ... the most user friendly process is to ignore the Thumbs.db files, queue up the valid files, and report the files that were skipped. By reporting all the disallowed files the user can abort if they deem those files important.
3. Further I would suggest that if it is detectable that the files are from different folders that a sub-album structure be optionally created (tick box on upload screen) using the name of the folder, as a child of the importing folder. This may result in sub-sub-folders, etc.