Bug fixes for "This is my organization" feature

Bug fixes:
* crashes when clicking "This is my organization" button because values were being passed to params hash in an order not matching the matchers in rake routes
* flash message telling user their request for org admin is pending now properly displays org name rather than calling it "My Organization"
* "This is my organization" button now is hidden if current user is:
  * not logged in
  * a site admin
  * a charity admin of the organization being viewed
  * a pending charity admin of the organization being viewed