New PR with changes in modals.less and compiled CSS-files - [#31643] Add styling to Isis - template.css

Changes to modals.less and 3 compiled CSS-files. 

"administrator/templates/isis/css/template-rtl.css" got alot of changes when using "build/generatecss.php", but it is only the part about ".modal-body iframe" that is what I have changed.

[#31643] Add styling to Isis - template.css
http://joomlacode.org/gf/project/joomla/tracker/?action=TrackerItemEdit&tracker_id=8103&tracker_item_id=31643