[Navigation Tree] Simplify logic (#3474)

* added new navigation method for tracking, lots of optimizations

* updated indicator logic, tweaked objectPath/navigationPath, removed old code

* added temporary ancestors variable to be used while building new tree ui during navigation

* removed observer for ancestors, all handled in composition watch now

* updates from PR comments

* fixing testing errors

* checking for older format of saved path, update if old

src/ui/layout/mct-tree.scss

@@ -26,6 +26,10 @@
         overflow: hidden;
         transition: all;
 
+        .c-tree__item-h {
+            width: 100%;
+        }
+
         &__scrollable-children {
             overflow: auto;
         }