[MU] Finner handling of reconnection

[chibenwa]

Description

Today,

GIVEN an expired OIDC token
THEN Tmail will prompt me to reconnect before refreshing the page

This "sure to reconnect" pop up was added to avoid data loss when composing an email.

While it serves this purpose VERY well it is not really needed and a bit bothering (users complains) when NOT editing an email.

I'd propose to:

• Keep the current behaviour ONLY when the composer is opened
• Improve the message: Your session expired. We need to take you back to the login page in order to refresh it. You might want to save the email you are currently editing before we do so. or something like that
• If no composer is opened, let's just refresh.

[chibenwa]

Thoughts @guimard @hoangdat ?

[hoangdat]

We added it from #2928.

IMO, it is 50-50 option. Still reasonable for me to aware what happen before going to login page.

Please make decision, we will change.

[chibenwa]

Decision is made.

See above.

Please proceed.