Highlight labels and relation arcs

Change-Id: I480ff2a83b22d2e252246a964c6a79a482d130f4
diff --git a/dev/scss/main/tree.scss b/dev/scss/main/tree.scss
index 3629590..088690f 100644
--- a/dev/scss/main/tree.scss
+++ b/dev/scss/main/tree.scss
@@ -10,13 +10,17 @@
   fill: none;
 }
 
+g.arc.infocus > path.edge {
+  stroke: $dark-green;
+}
+
 marker#arr {
   overflow: visible;
   path {
-    fill-opacity:1;
-    stroke-width: 2; 
     stroke: $darkest-orange;
     fill: $darkest-orange;
+    fill-opacity:1;
+    stroke-width: 2; 
   }
 }
 
@@ -41,6 +45,11 @@
   }
 }
 
+g.label.infocus rect {
+  stroke: $dark-green;
+  fill: $lightest-green;
+}
+
 g.middle.mark {
   rect {
     fill: $darker-orange;