Redirect to the member's source on request withdrawal

Signed-off-by: Rémy Coutable <remy@rymai.me>

app/controllers/concerns/membership_actions.rb

@@ -34,8 +34,9 @@ module MembershipActions
         else
           "You left the \"#{@member.source.human_name}\" #{source_type}."
         end
-      redirect_to [:dashboard, @member.real_source_type.tableize], notice: notice
+      redirect_path = @member.request? ? @member.source : [:dashboard, @member.real_source_type.tableize]
+      redirect_to redirect_path, notice: notice
     else
       if cannot_leave?
         alert = "You can not leave the \"#{@member.source.human_name}\" #{source_type}."

spec/controllers/groups/group_members_controller_spec.rb

@@ -134,7 +134,7 @@ describe Groups::GroupMembersController do
           delete :leave, group_id: group
           expect(response).to set_flash.to 'Your access request to the group has been withdrawn.'
-          expect(response).to redirect_to(dashboard_groups_path)
+          expect(response).to redirect_to(group_path(group))
           expect(group.members.request).to be_empty
           expect(group.users).not_to include user
         end

spec/controllers/projects/project_members_controller_spec.rb

@@ -190,7 +190,7 @@ describe Projects::ProjectMembersController do
                          project_id: project
           expect(response).to set_flash.to 'Your access request to the project has been withdrawn.'
-          expect(response).to redirect_to(dashboard_projects_path)
+          expect(response).to redirect_to(namespace_project_path(project.namespace, project))
           expect(project.members.request).to be_empty
           expect(project.users).not_to include user
         end