Use border-width instead of border for .ui-tabs-panel to make it easier to override.

Fixes #5475 - ui-tabs-panel border override should be border-width, not border.

Author: scottgonzalez

themes/base/jquery.ui.tabs.css

@@ -7,5 +7,5 @@
 .ui-tabs .ui-tabs-nav li.ui-tabs-selected { margin-bottom: 0; padding-bottom: 1px; }
 .ui-tabs .ui-tabs-nav li.ui-tabs-selected a, .ui-tabs .ui-tabs-nav li.ui-state-disabled a, .ui-tabs .ui-tabs-nav li.ui-state-processing a { cursor: text; }
 .ui-tabs .ui-tabs-nav li a, .ui-tabs.ui-tabs-collapsible .ui-tabs-nav li.ui-tabs-selected a { cursor: pointer; } /* first selector in group seems obsolete, but required to overcome bug in Opera applying cursor: text overall if defined elsewhere... */
-.ui-tabs .ui-tabs-panel { display: block; border: 0; padding: 1em 1.4em; background: none; }
+.ui-tabs .ui-tabs-panel { display: block; border-width: 0; padding: 1em 1.4em; background: none; }
 .ui-tabs .ui-tabs-hide { display: none !important; }