Setting previewers' tab titles?

preview

#1

Hey,

Might you be interested in a PR that provides a way to set the titles of previewer tabs, instead of the default [B] path, [M] url, etc?

Specifically, we have some applications that utilize the built-in browser previewer, and would be nice if we could easily, and cleanly, set/change the titles of such tabs!

Thanks!


#2

All pull requests are welcome! Go ahead and create one whenever you have something to show :thumbsup: