[ticket/10431] CSS3 buttons

CSS3 replacements for big buttons

PHPBB3-10431
[ticket/10431] Different font for iOS

Different font for buttons on iOS devices because Verdana looks
incorrectly aligned in Safari/iOS. Also slightly changed text shadow.

PHPBB3-10431
[ticket/10431] Adjustments for IE7

Adjustments to buttons for IE7

PHPBB3-10431
[ticket/10431] Changed fonts for Linux

Added backup fonts for Linux systems that do not have Verdana font

PHPBB3-10431
[ticket/10431] Adjustments for large buttons

Changing CSS for large buttons to display better on Mac browsers.
Fixing tabs.

PHPBB3-10431
[ticket/10431] Remove reply-all custom css

Remove CSS for reply-all button that is no longer used

PHPBB3-10431
[ticket/10431] Remove .left class from reply-all

Remove .left class from .reply-all button

PHPBB3-10431
Merge remote-tracking branch 'remotes/cyberalien/ticket/10431' into develop

# By Vjacheslav Trushkin
# Via Vjacheslav Trushkin
* remotes/cyberalien/ticket/10431:
  [ticket/10431] Remove .left class from reply-all
  [ticket/10431] Remove reply-all custom css
  [ticket/10431] Adjustments for large buttons
  [ticket/10431] Changed fonts for Linux
  [ticket/10431] Adjustments for IE7
  [ticket/10431] Different font for iOS
  [ticket/10431] CSS3 buttons