Unify similar tests in wizard budgets spec

We are unifying the test "Create budget - Knapsack voting (default)" with
"A new budget is always created in draft mode" because they are almost the same.

On the other hand, we also merged the test "update budget" with "submit the
form with errors and then without errors". Just like in the previous case, there
were two ways to access the edit page, so we removed the one that is already
tested in other specs.

spec/system/admin/budgets_wizard/budgets_spec.rb

@@ -2,7 +2,7 @@ require "rails_helper"
 
 describe "Budgets wizard, first step", :admin do
   describe "New" do
-    scenario "Create budget - Knapsack voting (default)" do
+    scenario "Create budget with Knapsack voting and in draft mode (default)" do
       visit admin_budgets_path
       click_button "Create new budget"
       click_link "Create multiple headings budget"
@@ -10,7 +10,7 @@ describe "Budgets wizard, first step", :admin do
       fill_in "Name", with: "M30 - Summer campaign"
       fill_in "Text on the link", with: "Participate now!"
       fill_in "The link takes you to (add a link)", with: "https://consuldemocracy.org"
-      fill_in "Name", with: "M30 - Summer campaign"
+
       click_button "Continue to groups"
 
       expect(page).to have_content "New participatory budget created successfully!"
@@ -19,6 +19,13 @@ describe "Budgets wizard, first step", :admin do
 
       expect(page).to have_field "Name", with: "M30 - Summer campaign"
       expect(page).to have_select "Final voting style", selected: "Knapsack"
+
+      within("#side_menu") { click_link "Participatory budgets" }
+      within("tr", text: "M30 - Summer campaign") { click_link "Edit" }
+
+      expect(page).to have_content "This participatory budget is in draft mode"
+      expect(page).to have_link "Preview"
+      expect(page).to have_button "Publish budget"
     end
 
     scenario "Create budget - Approval voting" do
@@ -75,52 +82,16 @@ describe "Budgets wizard, first step", :admin do
     end
   end
 
-  describe "Create" do
-    scenario "A new budget is always created in draft mode" do
-      visit admin_budgets_path
-      click_button "Create new budget"
-      click_link "Create multiple headings budget"
-
-      fill_in "Name", with: "M30 - Summer campaign"
-
-      click_button "Continue to groups"
-
-      expect(page).to have_content "New participatory budget created successfully!"
-
-      within("#side_menu") { click_link "Participatory budgets" }
-      within("tr", text: "M30 - Summer campaign") { click_link "Edit" }
-
-      expect(page).to have_content "This participatory budget is in draft mode"
-      expect(page).to have_link "Preview"
-      expect(page).to have_button "Publish budget"
-    end
-  end
-
   describe "Edit" do
-    scenario "update budget" do
+    scenario "update budget with errors and then without errors" do
       budget = create(:budget, name: "Budget wiht typo")
 
-      visit admin_budgets_wizard_budget_groups_path(budget)
+      visit edit_admin_budgets_wizard_budget_path(budget)
-
-      click_link "Go back to edit budget"
 
       expect(page).to have_content "Edit Participatory budget"
       expect(page).to have_css ".creation-timeline"
       expect(page).to have_field "Name", with: "Budget wiht typo"
 
-      fill_in "Name", with: "Budget without typos"
-      click_button "Continue to groups"
-
-      expect(page).to have_content "Participatory budget updated successfully"
-      expect(page).to have_content "Budget without typos"
-      expect(page).to have_css ".creation-timeline"
-      expect(page).to have_content "There are no groups"
-    end
-
-    scenario "submit the form with errors and then without errors" do
-      budget = create(:budget, name: "Budget wiht typo")
-
-      visit edit_admin_budgets_wizard_budget_path(budget)
       fill_in "Name", with: ""
       click_button "Continue to groups"