message: Use rgba() to render in Edge
diff: }
  .gui-settings svg path
  {
  - fill: #ddd;
  + fill: rgba(0,0,0,0.2);
  fill: #8884;
  opacity: 0.75;
  transform-origin: center !important;
  height: 100%;
  max-width: 70px;
  padding: 2px 8px;
  - background: #ddd;
  + background: rgba(0,0,0,0.2);
  background: #8884;
  transition: all 0.2s;
  font-size: 16px;
  }
  .gui-settings-checkbox-container input ~ svg
  {
  - background-color: #ddd;
  + background-color: rgba(0,0,0,0.2);
  background-color: #8884;
  }
  .gui-settings-checkbox-container input:checked ~ svg
  @@ -250,7 +250,7 @@ button.save:focus
  border-radius: 4px;
  background: $customStyleColor;
  margin-right: 16px;
  - border: 1px solid #ddd;
  + border: 1px solid rgba(0,0,0,0.2);
  border: 1px solid #8884;
  position: relative;
  cursor: pointer;
  