Merge pull request #79 from SubodhDahal/module-dropdown-fix

Bugfix: Dropdown list not being displayed in created modules
Display error pages only if debug mode is disabled
Merge pull request #80 from SubodhDahal/app-debug-mode

Display error pages only if debug mode is disabled
Fixed media manager for admin page and posts
Merge pull request #81 from masud79/media-manager-fix-for-posts

Fixed media manager for admin page and posts