Comment 0 for bug 1280163

[saas-2]Previewing Email Template Make loose Template and message edition

Tested on saas-2 on runbot:

1) Select Partner into the Partner list view
2) Click on 'more' and select 'Partner Mass Mailing'
3) Edit the selected template (lower right of the mail composer)
4) Click on 'Preview'
5) Template Preview is open and the previous windows are closed.

By chance the modification into the template are saved.
But if a user was writting a message into the body of the mail composer, all is lost.

Many thanks to fix this issue on [saas-2]