Merge branch 'winh-pikaday-dropdowns' into 'master'

Make Pikaday dropdowns style consistent

See merge request !13426

app/assets/stylesheets/framework/calendar.scss

@@ -95,8 +95,8 @@
   .is-selected .pika-day,
   .pika-day:hover,
   .is-today .pika-day {
-    background: $gl-primary;
-    color: $white-light;
+    background: $gray-darker;
+    color: $gl-text-color;
     box-shadow: none;
   }
 }