message: fix(SCSS): zindex now starting at 500
  The Angular CDK uses 1000 for it's global elements. 500 keeps us well under that while being higher
  than any local z-index' should require.
diff: @@ -28,7 +28,7 @@ $z-layers: (
  */
  @function z($name) {
  @if index($z-layers, $name) {
  - @return (length($z-layers) - index($z-layers, $name)) + 1000;
  + @return (length($z-layers) - index($z-layers, $name)) + 500;
  } @else {
  @error 'There is no item "#{$name}" in this list; choose one of: #{$z-layers}';
  @return null;
  