Option to disable signature on editing posts

[Ageless]

I'd like to request the option to disable signatures on editing posts. Now there are threads where it's asked not to post with the signature on and people still post with it on, as they forget to uncheck the 'show signature' option.

On editing the post one cannot change this.

[Nicolas]

Since you can only edit the post within 60 minutes after posting, I suggest the project admin uses this SQL command to remove signatures from existing posts on that thread, if they really should be removed:

UPDATE post SET signature=0 WHERE thread=[insert thread ID here];

(This doesn't invalidate the feature request)

[Rytis]

(In [13124]) Allow users to change signature option when editing posts (close #226).