make right side overlays go all the way to the top

src/Umbraco.Web.UI.Client/src/less/components/overlays.less

@@ -139,6 +139,12 @@
     padding: 20px;
 }
 
+// reset the top position to 0 because we are in a asbolute container and want to 
+// overlay to go all the way to the top
+.umb-editors .umb-overlay.umb-overlay-right {
+    top: 0;
+}
+
 /* ---------- OVERLAY LEFT ---------- */
 .umb-overlay.umb-overlay-left {
     width: 500px;