Form input field macros

[AshtonWooster]

This is associated with the issue: #6393

Added macros for "input_field_label", "input_field_errors", and "input_field". These should make managing the codebase easier and reduces the verbosity of the html code.

I only made edits to a couple of the places where these could be used. Let me know if this looks alright, or if there is anything to add/ change to make it more accessible or readable. Once it's finished, I'll go through and update other places where these could be used.

Additionally, thanks to @kx-chen for getting the backbone of this done!