Add missing icons in navbar for installed modules

Currently if you install a module there's not the associated class within the css to provide a nav icon for it (core modules get the clean sexy icons only). The main module layout handles this fine and pulls from the module assets. We're just going to make the navbar title grab an icon from the assets for aftermarket modules as well.

<hr>
<p align="center">
<b>Before This Patch</b>
<br>
<img src="http://i.imgur.com/Mky91P1.png">
</p>
<hr>
<p align="center">
<b>After This Patch</b>
<br>
<img src="http://i.imgur.com/zkW9iqc.png">
</p>

Side Note: IE10-11 dropped filters support among other odd changes. This can be fixed via javascript but at the cost of a bit of overhead. A workaround is detailed [here](http://www.majas-lapu-izstrade.lv/cross-browser-grayscale-image-example-using-css3-js/) and the unique target-able classname will help with this.