Rename class name in placeholder

Based on BS3 2535e060a48393143e7a6c2eb93a0a5d06663801
Better hiding of empty titles in popovers

BS3 commit 2aec6dae597b69502d09aec983598e5f955ca558
Fixes broken layout for .input-group-addons within .input-large. Follows… Removes invalid focus styles on inputs. Be more specific about disabled inputs to avoid iOS bug

BS3 commits eee719f608cd0e1fe9db7cd1206b1d4dc2078bd5,
90d4343f66d1cdafe24b6de0dbb6ae64312df323,
82f9de94593ea5dd8a8efd6a317a6c8b319cfff2
Removes invalid focus styles on inputs

BS3 commmit 90d4343f66d1cdafe24b6de0dbb6ae64312df323
Be more specific about disabled inputs to avoid iOS bug

BS3 commit 82f9de94593ea5dd8a8efd6a317a6c8b319cfff2