Possibility to manually change the phonnumber in the text message list to names instead

Hi!

Thanks for a great app!

Wish for the possibility in Join Chrome extension to manually add names instead of phonnumbers in the text message list. As it is for now there is only showing the phonnumber for each conversation that I have. I want to, perhaps to rightclick, have an option to change the phonnumber to a name instead. 

I don´t want to add each conversation as a contact in my phone (I know the name will show then) but just the possibility to change the number to a name.

Thanks,