[ticket/11914] Use unix line endings in plupload queue css file

PHPBB3-11914
[ticket/11914] Update plupload to 2.0.0

There are no longer seperate javascript files for each type of uploader.
New filenames have been kept as used inside the plupload package.

PHPBB3-11914
[ticket/11914] Add assets version to included plupload scripts

PHPBB3-11914
[ticket/12040] Prevent AJAX background animation flicker in ACP

PHPBB3-12040
Merge remote-tracking branch 'Marc/ticket/11914' into develop

* Marc/ticket/11914:
  [ticket/11914] Add assets version to included plupload scripts
  [ticket/11914] Update plupload to 2.0.0
  [ticket/11914] Use unix line endings in plupload queue css file
[ticket/12042] Add all language strings from PLUpload 2.0 to the language file

PHPBB3-12042
[ticket/12042] Replace B with a more meaningful key name

PHPBB3-12042
[ticket/11869] Fix strict standards error when registering.

PHPBB3-11869
[ticket/11507] Allow the posts awaiting approval value to be 0.

PHPBB3-11507
[ticket/11507] Fix the unapproved posts count query.

Only unapproved posts should be counted.

PHPBB3-11507
[ticket/11507] Allow group & unapproved post count options to be used alone.

PHPBB3-11507
[ticket/11507] Handle empty sets correctly.

Using the last parameter in $db->sql_in_set() does not give the correct
behaviour expected here. The query should not be negated if the set is empty.

PHPBB3-11507
Merge remote-tracking branch 'prototech/ticket/11869' into develop

* prototech/ticket/11869:
  [ticket/11869] Fix strict standards error when registering.
Merge remote-tracking branch 'prototech/ticket/12040' into develop

* prototech/ticket/12040:
  [ticket/12040] Prevent AJAX background animation flicker in ACP
Merge remote-tracking branch 'prototech/ticket/11507' into develop

* prototech/ticket/11507:
  [ticket/11507] Handle empty sets correctly.
  [ticket/11507] Allow group & unapproved post count options to be used alone.
  [ticket/11507] Fix the unapproved posts count query.
  [ticket/11507] Allow the posts awaiting approval value to be 0.
[ticket/12045] Correctly close <dd> with </dd>

PHPBB3-12045
[ticket/12045] Correctly close <span> before closing parent tag

PHPBB3-12045
[ticket/12045] Only display group selection if there are groups

Also fixed the empty option which is not allowed.

PHPBB3-12045
Merge remote-tracking branch 'nickvergessen/ticket/12042' into develop

# By Joas Schilling
# Via Joas Schilling
* nickvergessen/ticket/12042:
  [ticket/12042] Replace B with a more meaningful key name
  [ticket/12042] Add all language strings from PLUpload 2.0 to the language file
Merge remote-tracking branch 'nickvergessen/ticket/12045' into develop

# By Joas Schilling
# Via Joas Schilling
* nickvergessen/ticket/12045:
  [ticket/12045] Only display group selection if there are groups
  [ticket/12045] Correctly close <span> before closing parent tag
  [ticket/12045] Correctly close <dd> with </dd>