[ticket/12719] Add Normalize, base.css - SUITCSS, & grid + utilities

PHPBB3-12719
[ticket/12719] Remove Old Reset

PHPBB3-12719
[ticket/12719] Fix Paging

PHPBB3-12719
[ticket/12719] Fix buttons

PHPBB3-12719
[ticket/12719] Fix responsive menu icon

PHPBB3-12719
Merge branch 'ticket/12719' into test

* ticket/12719:
  [ticket/12719] Fix responsive menu icon
  [ticket/12719] Fix buttons
  [ticket/12719] Fix Paging
  [ticket/12719] Remove Old Reset
  [ticket/12719] Add Normalize, base.css - SUITCSS, & grid + utilities