[ticket/12604] Fix wrong padding when no notifications

Added a class to the <li> when the <li> represents that there's no
notifications (no_notifications) and
Added a CSS rule that matches the change to the HTML source for when
there's no notifications.

PHPBB3-12604
Merge pull request #2506 from brunoais/ticket/12604

[ticket/12604] Fix wrong padding when no notifications

* brunoais/ticket/12604:
  [ticket/12604] Fix wrong padding when no notifications
[ticket/12614] Make the post buttons always visible.

PHPBB3-12614
Merge pull request #2513 from prototech/ticket/12614

[ticket/12614] Make the post buttons always visible.

* prototech/ticket/12614:
  [ticket/12614] Make the post buttons always visible.
[ticket/12620] Allow the user to define multiples environments

PHPBB3-12620
[ticket/12620] Fix tests

PHPBB3-12620
[ticket/12620] Display error message when the environment isn't available

PHPBB3-12620
[ticket/12620] Rename debug to development

PHPBB3-12620
[ticket/12620] Improve error message

PHPBB3-12620
[ticket/12620] Fix functional tests

PHPBB3-12620
[ticket/12624] Add debug.load_time

PHPBB3-12624
[ticket/12609] Add a debug/prod container

PHPBB3-12609
[ticket/12609] Enable profiler

PHPBB3-12609
[ticket/12609] Add an interface for the event dispatcher

PHPBB3-12609
[ticket/12609] Use the new file header

PHPBB3-12609
[ticket/12609] Update comment

PHPBB3-12609
[ticket/12609] Rename the interface in dispatcher_interface

PHPBB3-12609
[ticket/12609] Update the file header

PHPBB3-12609
[ticket/12609] Add doc block

PHPBB3-12609
[ticket/12609] Rebased on develop-ascraeus

PHPBB3-12609