The callback does not actually do anything when cancelling the confirmation
box so we can avoid calling it altogether when cancel is clicked.
PHPBB3-13018
This ensures a more consistent handling of the various closing/opening actions
and fixes some bugs where certain event handlers are not turned off in certain
instances.
PHPBB3-13018
Added a non-breaking space to remove the following warning:
**Empty heading.**
```html
<h3 class="alert_title"></h3><p class="alert_text"></p>
```
PHPBB3-13040
[ticket/12734] Custom profile manager should not suppress errors when inserting user rows
* Senky/ticket/12734:
[ticket/12734] Remove unnecessary error supressing
[ticket/13005] Add event to display_forums() to modify category template data
* rxu/ticket/13005:
[ticket/13005] Add event to display_forums() to modify category template data
[ticket/13006] Add variables to the 'core.modify_quickmod_actions' event
* rxu/ticket/13006:
[ticket/13006] Add variables to the 'core.modify_quickmod_actions' event
[ticket/12976] Correctly use plurals for attachment count in UCP navigation
* nickvergessen/ticket/12976:
[ticket/12976] Correctly use plurals for attachment count in UCP navigation
Ticket/13052 Remove additional parameter from check_form_key()
* nickvergessen/ticket/13052:
[ticket/13052] Use request class instead of $_POST and request_var()
[ticket/13052] Fix appearances with multiple parameters
[ticket/13052] Remove additional parameter from check_form_key()
[ticket/13050] Allow topic/forum subscription when email/jabber is off
* rxu/ticket/13050:
[ticket/13050] Allow topic/forum subscription when email/jabber is off
Currently, there's impossible to subscribe topic/forum if emails and/or jabber
is disabled. This seems to be a 3.0 leftover since 3.1 introduces new
notification system which handles this case and offers email/jabber-free
board notifications.
PHPBB3-13050
[ticket/12852] Make get_url_parts handle get variable with no value
* Senky/ticket/12852:
[ticket/12852] Add unit tests
[ticket/12852] Add space after if
[ticket/12852] Remove whitespace
[ticket/12852] Make get_url_parts handle get variable with no value
[ticket/13031] Only use mimetype guesser guess if it helps us
* marc1706/ticket/13031:
[ticket/13031] Slightly change behavior of choose_mime_type and add unit tests
[ticket/13031] Guess with all mimetype guessers and pick best guess
[ticket/13031] Only use mimetype guesser guess if it helps us
The mime type 'application/octet-stream' will still always be overwritten by
proper guesses. However, guesses with guessers that have a higher priority
will now overwrite previous guesses even if the mime types of these guesses
had a slash in them.
PHPBB3-13031
