message: clear hairlines by making them transparent for now ...
  also some color changes
diff: @@ -80,7 +80,7 @@ $selected-color: $secondary-accent-color;
  $event-selected-color: $header-panel-bg-color;
  // used for the hairline dividers in RoomView
  -$primary-hairline-color: #e5e5e5;
  +$primary-hairline-color: transparent;
  // used for the border of input text fields
  $input-border-color: #e7e7e7;
  @@ -157,8 +157,8 @@ $rte-group-pill-color: #aaa;
  $topleftmenu-color: #212121;
  $roomheader-color: #45474a;
  -$roomheader-addroom-bg-color: #91A1C0;
  -$roomheader-addroom-fg-color: $accent-fg-color;
  +$roomheader-addroom-bg-color: #c9ced9;
  +$roomheader-addroom-fg-color: #5c6470;
  $tagpanel-button-color: #91A1C0;
  $roomheader-button-color: #91A1C0;
  $groupheader-button-color: #91A1C0;
  @@ -215,7 +215,7 @@ $roomsublist-label-fg-color: $roomtile-name-color;
  $roomsublist-label-bg-color: $tertiary-accent-color;
  $roomsublist-chevron-color: $accent-color;
  -$panel-divider-color: #dee1f3;
  +$panel-divider-color: transparent;
  // ********************
  