Delete option for my email on my watch

[Nexus1169]

I have installed Thunderbird for android in a search to change the primary gmail app. I have found a "problem" for me. When I received a mail from gmail or yahoo i don't have any option to delete that email with the help of my watch. I have option to remove(notification) ,mark as read, spam and some others but i don't have the option to delete that email using the watch. I need to go to my phone and delete that email manually from the phone. On the gmail app i have that option.

Also :

In the notification area "show delete button" was set previously "Always" and now is set "for single message notifications". But the option on the  watch to delete the email is still missing.

On my g-mail app i don't have to do any modification or any settings and the "delete" option is present on my Garmin watch and my phone uses Android.

[Jon]

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