fix edit project members access link and page fixes refs #2745
Update user finding (by username) in admin teams members controller
Update user finding (by username) in teams_members (project team) controller
Update user finding (by username) in teams members (team of users) controller
username is default param to User
fix links in admin group view page (user links)
rewrite admin users controller (use 1 variable and find by username)
simple cleanup code %)
Merge branch 'bugfix/path_and_page-project-member-access-#2745' into staging

* bugfix/path_and_page-project-member-access-#2745:
  simple cleanup code %)
  rewrite admin users controller (use 1 variable and find by username)
  fix links in admin group view page (user links)
  username is default param to User
  Update user finding (by username) in teams members (team of users) controller
  Update user finding (by username) in teams_members (project team) controller
  Update user finding (by username) in admin teams members controller
  fix edit project members access link and page fixes refs #2745