Update to Electron 9

[deepak1556]

This plan item is to cover the work of updating to Electron 9.

Current Status:

• Update merged to master as version 9.1.0
• Insiders testing this week

[tduyduc]

Please note that this Electron update will update Chrome to version 79 or above. Chrome with versions from 79 is known to cause problems with some input methods for Linux.
There are bug reports about this matter here, here, and here, and none of them have been resolved yet.

[deepak1556]

We have found electron 8 has quite a few regression wrt chromium devtools and with vscode also disabling LayoutNG, this is causing some unknown renderer freezes or layout artifacts in electron 8. Both of these issues are fixes in Electron 9 which bumps chromium version to 83. We are exploring to update to this version in July iteration.