Update git submodules

* Update plugins/codemirror-editor from branch 'master'
  to ee50e45b449e282ed78917175daf8b359da8d943
  - Lazy load codemirror assets
    
    Requires a relatively significant refactor of the attached function.
    
    Uses promises instead of callbacks for loading to tests and later code
    more legible and straightforward.
    
    Bug: Issue 8764
    Change-Id: I081564ff75c383bf042f77820e017ef04c8c313c
    
diff --git a/plugins/codemirror-editor b/plugins/codemirror-editor
index c97e280..ee50e45 160000
--- a/plugins/codemirror-editor
+++ b/plugins/codemirror-editor
@@ -1 +1 @@
-Subproject commit c97e2806532cff00fea6424cde0d440f9ea5016d
+Subproject commit ee50e45b449e282ed78917175daf8b359da8d943