Make "select all/none" tests actually test something

Since we were on the "Pending review" filter, and there were no records
pending review, the code checking all checkboxes were checked/unchecked
didn't test anything because there were no checkboxes on the page.

So we're clicking on the "All" filter first.

spec/system/moderation/budget_investments_spec.rb

@@ -108,6 +108,9 @@ describe "Moderate budget investments" do
         create_list(:budget_investment, 2, heading: heading, author: create(:user))
 
         visit moderation_budget_investments_path
+        within(".menu.simple") { click_link "All" }
+
+        expect(page).to have_field type: :checkbox, count: 3
 
         within(".js-check") { click_link "All" }
 

spec/system/moderation/comments_spec.rb

@@ -128,6 +128,9 @@ describe "Moderate comments" do
         create_list(:comment, 2)
 
         visit moderation_comments_path
+        within(".menu.simple") { click_link "All" }
+
+        expect(page).to have_field type: :checkbox, count: 2
 
         within(".js-check") { click_link "All" }
 

spec/system/moderation/debates_spec.rb

@@ -97,6 +97,9 @@ describe "Moderate debates" do
         create_list(:debate, 2)
 
         visit moderation_debates_path
+        within(".menu.simple") { click_link "All" }
+
+        expect(page).to have_field type: :checkbox, count: 2
 
         within(".js-check") { click_link "All" }
 

spec/system/moderation/proposal_notifications_spec.rb

@@ -108,6 +108,9 @@ describe "Moderate proposal notifications" do
         create_list(:proposal_notification, 2)
 
         visit moderation_proposal_notifications_path
+        within(".menu.simple") { click_link "All" }
+
+        expect(page).to have_field type: :checkbox, count: 2
 
         within(".js-check") { click_link "All" }
 

spec/system/moderation/proposals_spec.rb

@@ -96,6 +96,9 @@ describe "Moderate proposals" do
         create_list(:proposal, 2)
 
         visit moderation_proposals_path
+        within(".menu.simple") { click_link "All" }
+
+        expect(page).to have_field type: :checkbox, count: 3
 
         within(".js-check") { click_link "All" }