Merge pull request #733 from grantshepert/develop

Develop
Fixing issue #735
Fixing issue #736
Fixing issue #736
Adding attr args
Adding attr args
Adding extendObject back
Removing image preloader
Adding image preloader to template
Adding onAdminHTML(Head/Foot)Render events
Adding check for mura scope
Adding check for mura scope
Fixing issue with some global events not firing
Fixing folder ui customization issue
Fixing issue with event context being whiped out
Adding default value for type HTMLEditor attributes