fix(Buttons): correct button display CSS

Author: Ryan A. Johnson

src/helix-ui/styles/components/buttons.less

@@ -4,6 +4,7 @@
   border: 1px solid @cyan-900;
   color: @cyan-900;
   cursor: pointer;
+  display: inline-block;
   font: inherit;
   font-size: 0.875rem;
   font-weight: 500;