Prevent the ACE editor from overlapping the modal window (see contao#6497)

Author: leofeyer

Diff for: system/docs/CHANGELOG.md

@@ -4,6 +4,9 @@ Contao Open Source CMS changelog
 Version 3.2.2 (2013-XX-XX)
 --------------------------
 
+### Fixed
+Prevent the ACE editor from overlapping the modal window (see #6497).
+
 ### Fixed
 Use the default back end theme when running in safe mode (see #6505).