UP-4234v2: Updates to Marketplace UI

Several changes, including:
 - Moving the table filter and sorting buttons into one row;
 - Adding Bootstrap styles to filter form;
 - Making the featured tiles smaller;
 - Making the sort buttons smaller;
 - Adding some Font Awesome! icons to the UI;
 - Removing the 'Search' button (since the table is filtered live) and adding a 'Clear' button that clears the text in the search box;
 - Removed the unnecessary HTML elements created and JavaScript and wrote them as HTML in the body;
 - Fixed the issue with the sort buttons not showing active when pressed;
 - Cleaned up some CSS;

Before picture:
![marketplace_before](https://cloud.githubusercontent.com/assets/3999821/4328641/0f31bfe2-3f89-11e4-9c37-fb3adba445cf.png)

After picture:
![marketplace_after](https://cloud.githubusercontent.com/assets/3999821/4328657/25e222f4-3f89-11e4-9bdf-d4bef36ecc5f.png)

Is this a feature where you can intentionally enter the portlet -- for the first time -- with search terms  pre-loaded?  I can imagine that capability could be a benefit.

But honestly this code seems to be used only by the search button, which appears to be unwanted.  The list filters as you type.  The only thing you get for clicking the search button is a page reload (afaik).