Our forums is a great place where we do not have only support questions but also many suggestions, ideas and more.
A while ago we had a forum post started by @amartist where he asked for a button to open a full screen modal and have search form in there. He even went extra mile and sent us a sample code of what he wanted to achieve.
The snippet on http://bootsnipp.com/snippets/featured/full-screen-search by mouse was the thing he was looking for.
We converted snippet into a WordPress Plugin within 10 minutes and now anyone can create a full screen search in their WordPress Blog.
Usage of plugin is simple.
3- add a menu item with link #ult-fs-search
To download plugin https://github.com/ultimatumtheme/FullScreenSearch/archive/1.0.zip
You can also contribute to the plugin at github