frontend CHANGE refactor data modification

move data manipulation operations into a separate service to allow
better splitting to components without code/templates duplication
and communication between components via events
diff --git a/frontend/config/tree.component.scss b/frontend/config/tree.component.scss
index 6df3b8e..29571be 100644
--- a/frontend/config/tree.component.scss
+++ b/frontend/config/tree.component.scss
@@ -52,10 +52,7 @@
     }
 }
 .node_edit.dialog {
-    background-color: $colorChanged;
-    border: 2px solid $colorChangedBorder;
-    border-left-width: 0px;
-    border-right-width: 0px;
+    background-color: $colorChanged;;
 }
 
 .status,