Set HTML page title.

[domdfcoding]

Currently the tab title in Firefox is shown as localhost:8000, and when the tab is open the window is just titled "Mozilla Firefox". Contrast with this page which says New Issue — Mozilla Firefox. I'd like to be able to set the page title, so it says for instance My App Name — Mozilla Firefox, through the <title> element.

I see there is an option to Server for title, but that only changed what showed while the app is loading in the webpage - it didn't affect what the browser shows. I can't see a <title> element if I view the page using the browser's dev tools.

This would make it easier to identify which tab corresponds to the Textual app. I assume I could accomplish this with custom templates but I think it's common enough that it should be built in - especially as the title option already exists from which the title can be taken.

[domdfcoding]

I have started an implementation with the view to making a PR: https://github.com/domdfcoding/textual-serve/tree/html-title