Fix handling of btn-group placed inside input-group-btn (used for mixing dropdowns with normal buttons)
upgrade to grunt-html-validation v0.1.11
enable failHard grunt-html-validation option; fixes #11876
Downgrade Safari and OS X
Merge pull request #11916 from ZDroid/fix-iversions

Downgrade Safari and OS X
Merge pull request #11910 from InWayOpenSource/btn-group-inside-input-group-btn

Fix handling of .btn-group placed inside .input-group-btn
fix href of "Browser and device support"
Merge pull request #11923 from wangsai/fix-id

fix href of "Browser and device support"