Fix spaces for notify emails (issue #346)

[borrob]

The input for the email address for the notification allows for multiply entries if they are separated by commas. When the form is displayed again, spaces are added after the commas. The extra spaces generate an error when the user tries to safe the edits.

This commit fixes:

• no spaces are added when the form is displayed again.
• removes spaces in the email address field before saving.

[borrob]

Although the fix in the client looks ok, server-side handling should not depend on it. The server that handles the form should strip any whitespace around email addresses before storing. The current code does not seem to do this see app.py#L688. I think the code should be: [v.strip() for v in value] also on L691. I think this server-fix(es) can be added in addition to the client template fix here.

Good catch on the back end. I added the strip() commands to [v.strip() for v in value if v.strip()]. The latter v.strip() is still necessary since it will catch 'empty' (i.e. just spaces) values. This prevents errors when an email list is entered as a@mail.com, ,b@mail.com (notice the , , structure).

[justb4]

Thanks @borrob !