CSS for data browser

See yohanboniface/Leaflet.Storage#52

umap/static/umap/umap.css

@@ -206,4 +206,8 @@ body.content #storage-ui-container {
 }
 #id_editors + br + span.helptext {
     display: none;
-}
+}
\ No newline at end of file
+.leaflet-control-browse .storage-browse-actions a.add-datalayer,
+.leaflet-control-browse .storage-browse-actions a.storage-browse-link {
+    background-color: SeaGreen;
+}