bug: when webGL context is loss, focusing on window isn't enough to cause the webGL context to be brought back

[diehbria]

Describe the bug A clear and concise description of what the bug is.

To Reproduce Steps to reproduce the behavior:

1. Go to synchrocharts.com
2. Go do something else for a lengthy period of time
3. Come back to synchrocharts.com, look at the charts. The data will not be rendering
4. If you resize the window, the webGL context will restore and the renderings will come back

Expected behavior WebGL Context should be restored on window focus