Use refresh instead of visiting the current page

This way it's more obvious what's going on.

Note that, in this case, the expectations were **not** true before
visiting the page, so we aren't fixing a flaky test.

spec/system/admin/poll/booths_spec.rb

@@ -68,7 +68,7 @@ describe "Admin booths", :admin do
 
     expect(page).to have_content "Booth created successfully"
 
-    visit admin_booths_path
+    refresh
     expect(page).to have_content "Upcoming booth"
     expect(page).to have_content "39th Street, number 2, ground floor"
   end

spec/system/admin/poll/questions/options/options_spec.rb

@@ -64,7 +64,7 @@ describe "Poll question options", :admin do
     expect(page).to have_content "Changes saved"
     expect(page).to have_content "New title"
 
-    visit admin_question_path(question)
+    refresh
 
     expect(page).not_to have_content "Answer title"