refactor login verification in image controller, add goto_url to login redirect so it does not just redirect the user to the mysgn page if they are not logged in
refactor login verification in image controller, add goto_url to login
redirect so it does not just redirect the user to the mysgn page if
they are not logged in

solgenomics/sgn,solgenomics/sgn,solgenomics/sgn,solgenomics/sgn,solgenomics/sgn,solgenomics/sgn,solgenomics/sgn