Remove unsafe inline styles in favour of creating classes

[troyhunt]

Just noticed we've got some unsafe inline styles:

By default, these are blocked when we have a content security policy: https://content-security-policy.com/examples/allow-inline-style/

Let's move these over to the style sheet for existing and future styling.

[stebet]

@indyber I found a few of those in the new Pwned Passwords page as well

[troyhunt]

Opening this back up as we still have quite a few instances of this. I was trying to work out why things like the circles behind the steps on the notification page looked odd, then I saw the console:

@indyber given how close we are to launch, if this is a big job then we can always allow unsafe inline for a limited period then fix it shortly after. I'll let you make the call on this, but I think you need to do a "find all" for "style=" as there are still a few of them around. Let's make a fast call on whether we fix them now or allow unsafe inline for a bit.