Clicking on push notification does not open the right message

[hantt12]

Describe the bug
Clicking on push notification should open that message, not only Twake tab

To Reproduce
Steps to reproduce the behavior:

1. User A is opening another tab on his browser, not Twake
2. User B sends a message to user A
3. User A sees the push notification
4. User A clicks on the push notification
5. User A sees the Twake tab, on the same channel that he opens before, not the message that he clicks on the push notification

Expected behavior
Open the message that User A clicks on the notification

Desktop (please complete the following information):

• OS: Ubuntu
• Browser: Chrome, Firefox

[RomaricMourgues]

@stephanevieira75 this one should work now, but there is another issue: if notification point to a direct channel, it sometime changes the workspaces we are in (even if the direct channels are available from all the workspaces)