Chart Visualization isn't Drawn Properly
Chart Visualization isn't Drawn Properly

* Fix corrupted chart if it's rendered behind the scene.

Change-Id: I9aa715a1613f7cedf288c7b255b4b3e5e7e92f4d
Closes-Bug: #1643106

vishnuvv/contrail-web-core,nagakiran/contrail-web-core,biswajit-mandal/contrail-web-core,biswajit-mandal/contrail-web-core,vishnuvv/contrail-web-core,vishnuvv/contrail-web-core,nagakiran/contrail-web-core,nagakiran/contrail-web-core,biswajit-mandal/contrail-web-core