improve wording of a scenario from code review

part of PT story https://www.pivotaltracker.com/story/show/76232594
improve clarity based on @motasem-salem feedback
move authenticated used step into background for partner feature

part of PT story https://www.pivotaltracker.com/story/show/76232594
refactored partner feature based on similar feedback for the admin
user feature by @NikitaAvvakumov
move authenticated used step into background for sponsor feature

part of PT story https://www.pivotaltracker.com/story/show/76232594
refactored sponsor feature based on similar feedback for the admin
user feature by @NikitaAvvakumov
fixed typo in sponsors feature

part of PT story https://www.pivotaltracker.com/story/show/76232594