improve layout of code to jslint standards in helpers unit tests
Fix bug where image-delete icon was on top of floating headers
Improved image cancel button

* Removed duplicate references
* Adjusted hover styles
* Imroved visibility of icon on dark images
Grunt dev no longer opens browser

closes #1355
- dev task no longer calls open
Merge pull request #1358 from zacgeis/open-fix

Grunt dev no longer opens browser
Merge pull request #1336 from cobbspur/cleanhelpers

improve layout of code to jslint standards in helpers unit tests