[ticket/12646] Add data-f attribute to breadcrumb links

PHPBB3-12646
[ticket/12646] Changed index/home data attr & updated subsilver

PHPBB3-12646
[ticket/12646] Add check for navlinks.FORUM_ID

PHPBB3-12646
[ticket/12646] Changed to navlinks.MICRODATA

PHPBB3-12646
[ticket/12608] Improve notifications drop-down menu styling in header

PHPBB3-12608
[ticket/12608] Updated tests

PHPBB3-12608
[ticket/12608] Add styling (CSS class) options to notifications

This will allow different notifications to have different styles

PHPBB3-12608
[ticket/12608] Clean up whitespace

PHPBB3-12608
[ticket/12608] Improved LTR and various bugfixes

PHPBB3-12608
[ticket/12608] Remove somewhat redundant reported color style

PHPBB3-12608
[ticket/12608] Changed get_styling() to get_style_class()

PHPBB3-12608
[ticket/12608] Add subSilver

PHPBB3-12608
[ticket/12747] Drop support for Firebird

PHPBB3-12747
[ticket/12704] Improve the load time information in the footer when enabled

PR #2570 has added new constant to display load time information without
debug mode is being on (https://tracker.phpbb.com/browse/PHPBB3-12687).
This patch expands the total load time info with SQL/PHP load times,
while hiding the additional info with <abbr> element.

PHPBB3-12704
[ticket/12740] Use class for logo in css

PHPBB3-12740
[ticket/12730] Add Google+ profile field type

Google+ has a "+" before a custom URL but doesn't for those which are using
their integer ID. To cover that we need to have an extra profile field

PHPBB3-12730
[ticket/12730] Add a Google+ field by default

PHPBB3-12730
[ticket/12730] Spaces in block header

PHPBB3-12730
[ticket/12730] Incorrect indentation for type_googleplus

PHPBB3-12730
[ticket/12730] Minor formatting fixes

PHPBB3-12730