ENH Update focus states to be consistent (#1397)

Author: GuySartorelli

client/dist/styles/bundle.css

@@ -8,7 +8,6 @@
   &:focus,
   &:hover {
     box-shadow: $z-depth-1;
-    outline-width: 0;
   }
 
   &:hover {
@@ -17,6 +16,12 @@
     }
   }
 
+  &:focus-within {
+    // Set this explicitly instead of just setting the variable beacause
+    // we don't want to affect child items
+    outline-offset: var(--focus-outline-offset-inset);
+  }
+
   &--broken {
     cursor: default;
   }