data-ajax: unit tests added
Travis: Retry build due to htmlcompressor

htmlcompressor seems to be randomly failing, this should retry this line
since it is usually resolved with a restart.
WET theme: Search in mobile panel now scales down correctly
Merge pull request #4068 from nschonni/v4-travis_retry-for-htmlcompressor

Travis: Retry build due to htmlcompressor
Merge pull request #4067 from patheard/data-ajax-test

data-ajax: unit tests added
Merge pull request #4070 from pjackson28/fixmobilepanelsearch

WET theme: Search in mobile panel now scales down correctly
Toggle: optimized aria attribute setting