[ticket/11220] Improvement to the info pop-up from "list="

A improvement to the info popup which is displayed when the cursor
is over the bbcode-button [list=] in the posting-editor

PHPBB3-11220
[ticket/11030] Adding a new style class to file upload in Prosilver

In Prosilver , browse button of file upload element in post
attachment shows a cursor on mouse over. That was because a
CSS property is added with a common class name "inputbox".
I added a new CSS class for file upload element and included
it in file upload form template for Prosilver.

PHPBB3-11030

[ticket/11030] Changed style class of file upload in remaining places.

Changed file upload box style class in ucp avatar options.
Added a new style class to file upload boxes in acp to change cursor
to pointer  when hovering to browse button.

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

Fixed cursor appearing in file upload element browse button
in both prosilver and ACP styles. Added a new CSS class
'inputfile' to ACP style.

PHPBB3-11030