Started multiline manipulations

src/app/globals.css

@@ -347,6 +347,10 @@ body {
   background: #f8fbff;
 }
 
+.tree-grid tr.row-selected td {
+  background: #eaf1ff;
+}
+
 .tree-grid .placeholder-row td {
   background: #f7f7f7;
   color: #6b7280;