Controlling Chooser With License Icon Selections

[akmadian]

Description
This PR would change the method of controlling the license selection in the chooser from switches (and a check box for SA) to the license icons themselves.

Other information

Checklist:

• My pull request has a descriptive title (not a vague title like Update index.md).
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• I added tests for the changes I made (if applicable).
• I added or updated documentation (if applicable).
• I tried running the project locally and verified that there are no
  visible errors.

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[akmadian]

Going to be overwritten by #24, just merging so I can get the commit history to show I didn't check out for a week in the middle of GSoC :)