[ticket/11775] Fix error when moving the last post to another topic

PHPBB3-11775
[ticket/11775] Backport moving of the posting functions to 3.0

PHPBB3-11775
[ticket/11775] Add functional test for moving the last post

PHPBB3-11775
[ticket/11775] Split test into multiple steps

PHPBB3-11775
[ticket/11789] Remove colors from HTML code

PHPBB3-11789
[ticket/11775] Remove spaces at line ends

PHPBB3-11775
[ticket/11775] Fix doc blocks syntax

PHPBB3-11775
Merge remote-tracking branch 'nickvergessen/ticket/11775' into prep-release-3.0.12

* nickvergessen/ticket/11775:
  [ticket/11775] Fix doc blocks syntax
  [ticket/11775] Remove spaces at line ends
  [ticket/11775] Split test into multiple steps
  [ticket/11775] Add functional test for moving the last post
  [ticket/11775] Backport moving of the posting functions to 3.0
  [ticket/11775] Fix error when moving the last post to another topic
Merge branch 'prep-release-3.0.12' into develop-olympus

* prep-release-3.0.12:
  [ticket/11775] Fix doc blocks syntax
  [ticket/11775] Remove spaces at line ends
  [ticket/11775] Split test into multiple steps
  [ticket/11775] Add functional test for moving the last post
  [ticket/11775] Backport moving of the posting functions to 3.0
  [ticket/11775] Fix error when moving the last post to another topic
[ticket/11794] Add missing array element commas to docs/coding-guidelines.html

Even though the coding guidelines document prescribes "commas after every
array element", it contains several example code fragments with array elements
not terminated by a comma. This commit fixes that.

PHPBB3-11794
Merge remote-tracking branch 'rechosen/ticket/11794' into develop-olympus

* rechosen/ticket/11794:
  [ticket/11794] Add missing array element commas to docs/coding-guidelines.html
Merge remote-tracking branch 'cyberalien/ticket/11789' into develop-olympus

* cyberalien/ticket/11789:
  [ticket/11789] Remove colors from HTML code
[ticket/11789] Remove inline color in memberlist_view

PHPBB3-11789
Merge remote-tracking branch 'cyberalien/ticket/11789' into develop-olympus

* cyberalien/ticket/11789:
  [ticket/11789] Remove inline color in memberlist_view
[ticket/11801] removed some whitespace and added missing semi colon's in css

PHPBB3-11801
Merge remote-tracking branch 'Prosk8er/ticket/11801' into develop-olympus

* Prosk8er/ticket/11801:
  [ticket/11801] removed some whitespace and added missing semi colon's in css
[ticket/11802] replace $browser with $user->browser

PHPBB3-11802
Merge remote-tracking branch 'dhruvgoel92/ticket/11802' into prep-release-3.0.12

* dhruvgoel92/ticket/11802:
  [ticket/11802] replace $browser with $user->browser
Merge branch 'prep-release-3.0.12' into develop-olympus

* prep-release-3.0.12:
  [ticket/11802] replace $browser with $user->browser
[ticket/11799] Send anti abuse headers in "new password" emails.

PHPBB3-11799