beautified spritz.js
maybe solved scroll issue in settings dialog
prevent spritz taps if content is still downloaded

this restricts spritz parsing to processed pocket data,
i.e. displayed data and spritzified data will be the same.

Otherwise spritz will parse the webpage itself, which usually fails.
tried to move spritz login stuff into iframe

Need to change login_result thing... hopefully that works.

Need to test on LuneOS.
Maybe keep old version for legacy?
Let's see... or use webView there? But not working on 2.x?