Fix "No synchronized folders" popup not showing on Mac(RF VM's)

On Rainforest 90% of the tests are failing because when the testers install Drive, when they connect the account and login, the "No synchronized folders" popup doesn't appear.

There are some cases where the popup appears, so it's hard to always reproduce

How to reproduce

• With new user install drive 4.0.0 : https://qa.nuxeo.org/jenkins/view/Drive/job/Drive/job/Drive-packages/676/artifact/dist/nuxeo-drive-4.0.0.dmg
• add account and login

Expected Result: Nuxeo Drive - Filters "No synchronized folders" popup should've appear

Actual Result:

• WebUi page opens, "No synchronized folders" popup doesn't appear - Chrome and FF
• Can't open the page error - Safari

Rainforest failed tests results: https://app.rainforestqa.com/runs/351710/tests/128648/browsers/safari11_1440_900/steps/30036122
HTTP request log: http_Logs
Browser logs: B_Logs

screenshots and tester video in attachment