Tiny UI fixes for users and projects

Addresses #1725, #1727, #1728

For #1725:
There were a lot of extra <br /> tags on the user show page, I removed the unnecessary ones.
I also moved the whitespace on the project show page down to below the author info, it actually makes sense to have some there.

For #1727:
I turned of autofill on the new email form by providing a default value of "".

For #1728:
Because admins should still be able to see who's email address/password is being changed, it only removes the extra text if you're editing your own email or password.