Huh.. When I uninstalled it through synaptic package manager it disappeared.
So no, I am not able to install it again. And when I try $ sudo apt install thunderbird I get the thing you have guys have been talking about: "Note, selecting 'icedove' instead of 'thunderbird'"But why I had the package in the first place... I have no idea. I think maybe because I installed from a relatively old T8 image and updated afterwards. Instead downloading fresh image.
