Adjust Icons on Apps and Files section of UA Creation

[rjaltman]

The icons on the Apps and Files section of the User Account creation process is incredibly aged; these are reminiscent of the original design document. As a result, very poor visual choices show up in what is otherwise a modest visual implementation of user account creation, and brings down the entire experience. Since this platform is heavily shipped on the concept of visual emendations, we should probably ensure a visual foundation is solidified as much as possible.