classname correction in moduleservices handler
Merge pull request #917 from zikula/moduleservices

classname correction in moduleservices handler
Correctly case file.

Zikula_Form_Plugin_PostBackFunction requires file named `PostBackFunction.php` and not `PostbackFunction.php` refs #916
Update config.yml
declare array var to avoid errors when neither function exists.
Merge pull request #919 from craigh/var_fix

declare array var to avoid errors when neither function exists.
Fix imagine configuration screen, closes #774.

Fix imagine configuration screen, closes #774.

Fix imagine configuration screen, closes #774.
Merge pull request #915 from phaidon/system-plugin-fix

Fix imagine configuration screen, closes #774.
Category tree html encoding problem fixed, closes #681
Merge pull request #921 from phaidon/category-tree-fix

Category tree html encoding problem fixed, closes #681
Extmenu drag and drop fixed, closes #801.
Merge pull request #924 from phaidon/extmenu-draggable-fix

Extmenu drag and drop fixed, closes #801.
SetState module problem fixed, closes #843.
Merge pull request #925 from phaidon/module-setstate-fix

SetState module problem fixed, closes #843.
 Deprecated preg_replace() /e modifier in DataUtil replaced, refs #889.
Merge pull request #926 from phaidon/preg-replace-replace-fix

 Deprecated preg_replace() /e modifier in DataUtil replaced, refs #889.
Show an error message if version number of a module is incorrect
Merge pull request #927 from phaidon/error-message-for-wrong-version-number

Show an error message if version number of a module is incorrect
Site off login fixed, closes #928, refs #606.
Login disabled if new core version was detected, closes #606.