[ticket/12124] Revert to basic uploader if the html5 runtime is not supported.

PHPBB3-12124
[ticket/12124] Remove double bang.

PHPBB3-12124
[ticket/12135] Reduce verbosity in bbfontstyle() by using textarea var.

PHPBB3-12135
[ticket/12124] Set attachment data to preserve AJAX delete functionality.

PHPBB3-12124
[ticket/12124] The textarea selector is failing in IE8 & 9.

PHPBB3-12124
[ticket/12124] IE8 does not support indexOf() for arrays.

PHPBB3-12124
Merge remote-tracking branch 'prototech/ticket/12124' into develop
[ticket/12140] Remove the diff class / MOD text build script

PHPBB3-12140
Merge remote-tracking branch 'prototech/ticket/12135' into develop
Merge remote-tracking branch 'naderman/ticket/12140' into develop-olympus

* naderman/ticket/12140:
  [ticket/12140] Remove the diff class / MOD text build script
Merge branch 'develop-olympus' into develop

* develop-olympus:
  [ticket/12140] Remove the diff class / MOD text build script

Conflicts:
	build/build_diff.php