Fixes some issues with tab formatting

src/definitions/modules/tab.less

@@ -41,23 +41,23 @@
   overflow: hidden;
   display: block;
   min-height: 250px;
-  text-indent: -10000px;
 }
 .ui.tab.loading * {
   position: relative !important;
   left: -10000px !important;
 }
 .ui.tab.loading:after {
+  border: none;
   position: absolute;
   top: 50px;
   left: 50%;
   content: 'Loading...';
   margin-left: -32px;
-  text-indent: 5px;
+  text-indent: 10px;
   color: rgba(0, 0, 0, 0.4);
   width: 100%;
   height: 100%;
-  padding-top: 75px;
-  background: url(../images/loader-large.gif) no-repeat 0px 0px;
+  padding-top: 80px;
+  background: url(../../themes/packages/default/assets/images/loader-large.gif) no-repeat 0px 0px;
   visibility: visible;
 }