Remove top buttons on backend forms

Backend CiviCRM forms can be overwhelming. It's not always obvious why. Few people will say "oh my, those buttons are overwhelming", because it's obvious what they do, but every bit of redundant information becomes a bit more clutter that the brain has the process.

For example, New Price Set form:

Removing the top buttons means that the eye can go directly to filling in the form (although, that help message eh.. but that's another topic):

I know we want interfaces to be consistent, and I would apply that kind of fix to most forms, unless there is a really good reason not to (ex: frontend contribution review form).

Some people might miss those buttons, but I think most new and regular users will be happy to see them go away. Personally I often hide them in CSS, but I'm trying to push for more core improvements, less hacks.

cc @larssg @artfulrobot @nicol @yashodha @mattwire (you have expressed interest on this topic in the past)