UI improvements

[cfoellmann]

• wrap pages -> closer to WP core styling
• hide the menu item for the password reset page without negative side effects
• click on section title to focus int/string field

[convissor]

Thanks for the thoughts. Cherry picked one of the commits. The rest churn things for little benefit or change coding style in undesirable ways.

[cfoellmann]

What is the problem with the coding style? What is undesirable about using core UI without hickups?

[convissor]

Thanks for everything.