[ticket/11030] Fixing cursor appearing in file upload browse button.

Removed unnecessary cursor CSS properties added for form inputs in both acp
and prosilver styles. Added cursor:pointer property only for buttons.

PHPBB3-11030
[ticket/11030] Fix cursor for checkboxes

PHPBB3-11030
Merge pull request #1840 from cyberalien/ticket/11030

Fix cursor in prosilver and ACP
[ticket/11746] The IN_PHPBB check is not necessary.

PHPBB3-11746
Merge pull request #1848 from prototech/ticket/11746

[ticket/11746] Add "admin activation required" notification
[ticket/11972] Add posting_editor_subject_after template event

PHPBB3-11972
[ticket/11972] Add posting_editor_subject_before template event

PHPBB3-11972
[ticket/11972] Add posting_editor_message_before template event

PHPBB3-11972
[ticket/11972] Add posting_editor_message_after template event

PHPBB3-11972
[ticket/11972] Add the sinces

PHPBB3-11972
[ticket/11972] Fix the sinces

PHPBB3-11972