Fix search-non-auth.js

[miketaylr]

Blocks #2106

Error fetching http://localhost:5000/issues?page=1&per_page=50&state=open&stage=all&sort=created&direction=desc
✓ firefox on darwin 17.4.0 - Search (non-auth) - Pressing g inside of search input *doesnt* go to github issues (11.546s)
✓ firefox on darwin 17.4.0 - Search (non-auth) - Clicking on label search adds query parameter to the URL (6.29s)
× firefox on darwin 17.4.0 - Search (non-auth) - Clicking on label search updates the search input (22.049s)
    NoSuchElement: An element could not be located on the page using the given search parameters.
      at Test.Clicking on label search updates the search input [as test]  <tests/functional/search-non-auth.js:64:10>
      at <src/lib/Test.ts:260:47>

✓ firefox on darwin 17.4.0 - Search (non-auth) - Search input is visible (5.515s)
× firefox on darwin 17.4.0 - Search (non-auth) - Empty search input removes q param (10.317s)
    NoSuchElement: [POST http://localhost:4444/wd/hub/session/efd705aa-2cb8-5e4b-96e3-4af2d9e34f3e/element / {"using":"css selector","value":"#js-SearchForm-input"}] Unable to locate element: #js-SearchForm-input
    For documentation on this error, please visit: http://seleniumhq.org/exceptions/no_such_element.html
    Build info: version: '3.5.2', revision: '10229a9020', time: '2017-08-21T17:54:21.164Z'
    System info: host: 'omg-5', ip: '192.168.2.83', os.name: 'Mac OS X', os.arch: 'x86_64', os.version: '10.13.3', java.version: '1.8.0_144'
    Driver info: driver.version: unknown
      at Test.Empty search input removes q param [as test]  <tests/functional/search-non-auth.js:99:10>
      at <src/lib/Test.ts:260:47>

TOTAL: tested 1 platforms, 3 passed, 2 failed