Issue #1088. Add pointer-events:none to non-button font icons.

This is to prevent them from consuming the click event in Chrome,
which apparently doesn't bubble up to the parent <button>?

webcompat/static/css/development/components/icon-font.css

@@ -21,6 +21,10 @@
   vertical-align:middle;
 }
 
+.wc-Icon:not(button) {
+  pointer-events: none;
+}
+
 .wc-Icon--cloud-download:before {
   content: "\f0ed";
 }