VerticalDelegate.controlsPerPage now calls sizeProp method on local scope rather than global scope.
VerticalDelegate.setScrollThreshold now calls sizeProp method on local scope rather than global scope.

Found the a similar error to the previous commit and the original bug-request in the setScrollThreshold method.
Merge pull request #867 from Rayraz/ENYO-4076

Fix for: ENYO-276 (external ENYO-4076)

Reviewed-By: Cole Davis (cole.davis@lge.com)
Integrated-By: Aaron Tam (aaron.tam@lge.com)