case 2312 - Availability to show only active facet in facet groups.
case 2313 - Fixed checkbox for in IE8.
case 2313 - Fixed JS eror in IE 7-8.
case 2405 - Various JS fatal error fixes.
case 2405 - Correctly display facets when empty results returned from pz service.
Merge branch 'case-2405' into develop

* case-2405:
  case 2405 - Correctly display facets when empty results returned from pz service.
  case 2405 - Various JS fatal error fixes.
case 2405 - Term name with space caused wrong links in UI.
case 2405 - Display facet term togglers even with empty pz results.
Merge branch 'case-2405' into develop

* case-2405:
  case 2405 - Display facet term togglers even with empty pz results.
Merge remote-tracking branch 'origin/develop'