ERP5TypeLiveTestCase: Remove FS reloader as ZODB Components should be used from now on.
erp5_code_mirror: Update to 3.22.
ZODB Components: Add CodeMirror editor.

CodeMirror API is much more cleaner (from code and design point of view) than
Ace Editor and include useful plugins, such as MergeView supported in ERP5 to
diff with previous versions.