[#68] Fix button over Nebula's button

In Chrome, the specificity of the rule is not high enough. In Firefox it
works. Using `!important` is the easiest to make it work, increasing
specificity with `div.[...]` also works

src/styles/content.scss

@@ -67,7 +67,7 @@ html.enhancer-fullVideo.page-video {
 }
 
 .enhancer-queueButton {
-  top: 24px;
+  top: 24px !important;
   bottom: unset;
   line-height: 0;
   opacity: 0;