Small adjustments needed to the login screen

[pixelipo]

Copied from #7249 (comment)

OK, here's my review opinion. I'm adding it as a comment since it's not breaking issues, but I would like to see these fixed:

1. Logo is too high up; actually, its distance from top is OK, but now it's too far from the form itself:
   
   I would remove 16px top+bottom margins from form {} in guest.css since they don't seem needed

2. Is there a reason why footer has height: 70px? We can easily remove it (I think) and change the p.info {margin: 0 auto; padding-top: 20px; to simpler p.info {margin: 20px auto;} Added advantage to these changes would mean that the whole page would fit nicely on 320*480 screen:
   

3. "Wrong password " warning is above the #submit# button, but the #lost-password` warning is bellow - makes no sense at all:
   

4. Additionally, "Lost Password" warning also has opacity: .7; added to it for some reason.

[rpirritano]

@pixelipo Is this still available? If so I can take it?

[pixelipo]

Yes it is, @rpirritano - be my guest :)

[rpirritano]

@pixelipo ,
For item #3 above, do you want the Wrong Password warning to no longer appear on that page or do you just want it to remain, but right above lost-password warning?

[pixelipo]

Ot should definitely appear under all the buttons. Ideally, it should also disappear as soon as "Forgot password?" button is clicked. That way, only one error should be visible at any given moment.

[rpirritano]

I completed all the above changes, submitted the pull request.