[ticket/11789] Remove colors from HTML code

PHPBB3-11789
[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
[ticket/11769] Correctly supply the post author's username in posting.php

Only supply the username, when it is a guest posting or we edit and it was
supplied, otherwise post_data might hold data of the post we quote, in which
case username is the original poster, not the current one.

PHPBB3-11769
[ticket/11769] Fix language issues in the doc blocks

PHPBB3-11769
[ticket/11769] Allow '0' as username in notification mails

PHPBB3-11769
Merge remote-tracking branch 'bantu/ticket/11799' into develop-olympus

* bantu/ticket/11799:
  [ticket/11799] Send anti abuse headers in "new password" emails.
[ticket/11769] Allow '0' as username

PHPBB3-11769
[ticket/11769] Allow using 0 as poster name

PHPBB3-11769
[ticket/11821] Fix comma usage next to "You are receiving this notification".

This is a partial backport of 31502cdd6c3a5bac5164ec30530e5b4bf63f3196.

PHPBB3-11821
Merge remote-tracking branch 'bantu/ticket/11821' into develop-olympus

* bantu/ticket/11821:
  [ticket/11821] Fix comma usage next to "You are receiving this notification".