Add Dropdown for Challenge Type

[SaintPeter]

Challenge Type is a numeric, for one of these values:

  common.challengeTypes = {
    HTML: '0',
    JS: '1',  // Waypoint
    VIDEO: '2',
    ZIPLINE: '3',
    BASEJUMP: '4',
    BONFIRE: '5',
    HIKES: '6',
    STEP: '7'
  };

Drop down should display as: Waypoint (1) ... Bonfire (5) ... Step (7)

So you can see the value as well as the common name.