Apply focus after attaching node to scene

This fixes problems where focus was not properly applied to videos resulting in lack of controls

components/data/GroupStack.brs

@@ -31,6 +31,13 @@ sub push(newGroup)
 
     m.groups.push(newGroup)
 
+    ' TODO: figure out a better way to do this without relying on indexing
+    if currentGroup <> invalid
+        m.scene.replaceChild(newGroup, 1)
+    else
+        m.scene.appendChild(newGroup)
+    end if
+
     'observe info about new group, set overhang title, etc.
     if newGroup.isSubType("JFGroup")
         registerOverhangData(newGroup)
@@ -45,13 +52,6 @@ sub push(newGroup)
         newGroup.control = "play"
         m.overhang.visible = false
     end if
-
-    ' TODO: figure out a better way to do this without relying on indexing
-    if currentGroup <> invalid
-        m.scene.replaceChild(newGroup, 1)
-    else
-        m.scene.appendChild(newGroup)
-    end if
 end sub
 
 '

source/utils/sceneManager.brs

@@ -1,14 +0,0 @@
-'
-' Create a SceneManager instance to help manage application groups
-function InitSceneManager(scene as object) as object
-    ' Create a node object so data is passed by reference and to avoid
-    ' having to re-save associative array in global variable.
-    groupStack = CreateObject("roSGNode", "GroupStack")
-    obj = {
-        groupStack: groupStack,
-        pushGroup: sub(group) : m.groupStack.callFunc("push", group) : end sub,
-        popGroup: sub() : m.groupStack.callFunc("pop") : end sub,
-        peekGroup: function() : return m.groupStack.callFunc("peek") : end function
-    }
-    return obj
-end function