Fixed the Sencha framework picker to enable filters in the Mocha test runner

Stores the state for the chosen Sencha framework in localStorage so that
it can be used when filtering on descriptions or tests that replace
query parameters. platform, version, and newcdn query parameters always
take priority and will update localStorage.

Fixes #88.
Merge pull request #89 from superstructor/feature/88

Fixed the Sencha framework picker to enable filters in the Mocha test runner