message: Make `quick-mention` button ever-so-slightly more visible
diff: @@ -5,7 +5,7 @@ button.rgh-quick-mention {
  /* Show button when the avatar or the button itself are hovered/focused */
  :not(:hover):not(:focus) + button.rgh-quick-mention:not(:hover):not(:focus) {
  - opacity: 0; /* As opposed to display:none, this makes it appear when the user hovers it even when hidden, so you don't have to hover the avatar first */
  + opacity: 0.1;
  }
  /* Show icon in black if it's not hovered/focused, instead of the blue color caused by .btn-link */
  