allow renaming in more contexts+example

1) Tried renaming this to foobah+discussion and get a 500 error:

2) And it's definitely broader. Can't rename this either:

3) ...or this ticket itself (from "allow renaming of AplusB to CplusB" to "allow renaming in more contexts")

Some Tickets can be renamed; not clear yet what makes the difference.

4) Tried to rename Grant Kruger+image to Grant Kruger+image (which you'll note doesn't exist) and got:

PGError: ERROR: duplicate key value violates unique constraint "cards_key_uniq" : update cards set "name" = '', "key" = '' where id=3901
An email about this error has been sent to the authors of Wagn
500 Internal Server Error

Same error but id=4063 trying to rename rename cards mentioned in WQL to "update cards mentioned in WQL"

5) Tried to rename 0.10.3 to 0.10+3 and got the "done" message but stayed in edit mode, with no rename happening. (btw, already created a new 0.10+3)

More cards that want renaming:

facilitate creation or import of multiple users —> facilitate creation or import of multiple users

/wagn/%E2%88%9Aprogress_bar_or_wheel_for_slow_loads - remove √

interpret Wagn links in PlainText - remove "Phrase and"

http://connectipedia.org/wagn/Finance-_Fundraising remove "- Fundraising"

portland+Wiki Wednesday - remove extra e