Update CodeMirror to v4 RC2

Narciso Jaramillo · Narciso Jaramillo · commit 5c4eac3c6390 · 2014-03-17T14:44:23.000+01:00
diff --git a/src/thirdparty/CodeMirror2 b/src/thirdparty/CodeMirror2
@@ -1 +1 @@
-Subproject commit 37d31d53b699bdfe92ffa5142c2c311be4882c6c
+Subproject commit afb56fa0526c24b5c54d049d298ab69d191ccbcf
