BHV-11567 Fix missing semicolon

Issue
-------
When dataGridList is reset, generatePage() assigns appended string to this.style which is composed with css properties. 
Usually It is parsed well but in specific case it return unexpected value due to missing semicolon

Cause
-------
layout() in VerticalGridDeleage.js missed semicolon when it compose string.
{code}
c.addStyles(
   ...	
   "height: " + Math.round(h) +  "px"
);
{code}

Fix
---
Add semicolon resolve it.

Enyo-DCO-1.1-Signed-off-by: David Um david.um@lge.com