WIDGPT-53: Resized icons to same height; added text background

Resize icons to be the same height, image icons responsive

After picture
![app_tiles](https://cloud.githubusercontent.com/assets/3999821/4328733/97803846-3f8a-11e4-85da-7fb27b727cae.png)

Yup.  So, can the class be `${n}_app-launcher-item` instead?  as in

    .${n}_app-launcher-item {

and then

    <div id="${n}app" class="${n}_app-launcher-item">

?