PR 100512 - WebWorks: Zoom and Pan on pages set as user-scalable in WebWorks while in Portrait mode can cause the page to be stuck rendering incorrectly

[EricLeiLi]

Moved from PRzilla:

Observed Behaviour: Zoom and Pan on pages set as user-scalable in WebWorks
while in Portrait mode can cause the page to be stuck rendering incorrectly.

Expected Behaviour: Zoom and Pan should be as smooth as the browser

Steps to Reproduce:
1 - Load attached WebWorks Application (Test6)
2 - Ensure device is in portrait orientation
3 - Run Application. Navigate through links "Run all 6.0 tests on atg05-yyz" ->
"7. Meta Viewport" (non-API Tests section) -> "7. Set initial scale to 10"
4 - Place finger in top left with thumb just beneath it. Extend thumb towards
bottom right. (zooming in action)
5 - With just finger, drag from top left to bottom right.
6 - Artifacting and rendering issues should now be evident. Further zooms/pans
will not resolve the issue.

Attachment: Example Test Application (https://github.com/downloads/blackberry-webworks/WebWorks-TabletOS/Test6.bar)