message: Change highlight colour on dark theme
  Fixes
diff: @@ -122,7 +122,7 @@ $event-redacted-fg-color: #606060;
  $event-redacted-border-color: #000000;
  $event-highlight-fg-color: $warning-color;
  -$event-highlight-bg-color: $event-selected-color;
  +$event-highlight-bg-color: #25271F;
  // event timestamp
  $event-timestamp-color: $text-secondary-color;
  