fix(tabs): fix tab css cursor

* fix tab cursor for hover state on non-disabled tab.

Closes #5250
Fixes #5247

Author: icfantv

Diff for: src/tabs/tabs.css

@@ -7,8 +7,9 @@
 }
 .uib-tab > div:focus,
 .uib-tab > div:hover {
-  background-color: #eee;
   color: #23527c;
+  cursor: pointer;
+  background-color: #eee;
 }
 .uib-tab.disabled > div {
   color: #777;
@@ -44,4 +45,4 @@
 .nav-pills > .uib-tab.active > div:hover {
   color: #fff;
   background-color: #337ab7;
-}
+}