Table: Removed duplicate display property from CSS. Fixes #5985. Thanks @mish7 !
Theme: Use shorthand for background color fallback to make it work on IE7. Fixes #6002.

Note: The issue won't be fixed if you use ui-icon-alt. See comment at #6002 in the issue tracker.
Merge branch 'master' into next

Note: Fix for #6002 not applied while merging in the 1.4 "next" branch, because IE7 became C-grade.
Textinput: Placeholder style for IE10.