[ticket/11030] Removed cursor property and combining commits.

Removed cursor: pointer property from input elements in both
prosilver and acp styles. Then squashing last three commits
into a single commit.

PHPBB3-11030

[ticket/11030] Fixed cursor appearing in fileupload element.

Fixed cursor appearing in fileupload element browse button in
both prosilver and acp style. Added a new style class named
'inputfile' to acp style. Removed 'inputbox' class from fileupload
elements in prosilver.

PHPBB3-11030

[ticket/11030] Adding colors again.

Added a color style again for file upload element.

PHPBB3-11030

[ticket/11030] Removed cursor property.

Removed cursor:pointer property from top level input style.
Removed cursor:text property where it needed for overriding.

PHPBB3-11030