fix(tabs): correct flex-basis

Author: 100stacks

src/helix-ui/styles/elements/hx-tabcontent.less

@@ -3,6 +3,7 @@ hx-tabcontent {
   border-color: @gray-300 transparent;
   border-style: solid;
   border-width: 1px;
+  flex-basis: 0px;
   flex-shrink: 0;
   min-height: 14rem; // 224px
   overflow: hidden;