Add gl-max-w-48 & gl-max-w-58 CSS utilities
Needed for the design of gitlab#348494 (closed). We in Growth Conversion plan to implement as part of our experiment promotion task (if the experiment is a success).
$gl-spacing-scale-48: 48 * $grid-size;
$gl-spacing-scale-58: 58 * $grid-size;
.gl-max-w-48 {
max-width: $gl-spacing-scale-48;
}
.gl-max-w-58 {
max-width: $gl-spacing-scale-58;
}