add fixed width to image preview tooltips in image formtool

git-svn-id: https://farcry.jira.com/svn/FC/trunk@12990 8f7d33b6-1012-0410-9a5a-bb7ecce9c363
remove erroneous backslashes

git-svn-id: https://farcry.jira.com/svn/FC/trunk@12991 8f7d33b6-1012-0410-9a5a-bb7ecce9c363