Simplify code using class_uses_recursive helper
Moved `ViewMaker` trait to live under system, it can be useful for Models too.
Moved the PathMaker trait functionality to Filesystem class (see October Rain)
Str::getRealClass -> class_basename
Fixes validation on Tabs and Cms pages
Fixes flaw in JS, custom dropdowns now focus when invalid
Fixes #359 - Sorting should work for hybrid touch/mouse devices now
Update fork ref
Adds nested option used for isolating containers