[WIP] #4466 Port settings pages to Bootstrap (edit profile, edit account, privacy, services)

Partial fix for meta bug #4466

It's ported, but there can be some improvements on the looks, I'll post some screenshots in this PR.

Button styles: it's using Bootstrap classes, for the sake of consistency, I strongy suggest using Bootstrap classes (btn, btn-primary, btn-danger), but **overriding the default styles** so it won't look "bootstrappy".

However, the styles are **not** overridden on this PR.

I ran any rspec tests that I've thought could be related. There are lots of Jasmine tests failing, but those don't seem to be related to these changes. Further instructions/help appreciated.