Remove duplication in poll actions tables

We were using the same logic in four different places, so we're creating
a new class to handle that logic.

Note that I didn't find a way to delegate the `content` method to a
`Admin::TableActionsComponent`, so we're delegating the `action` method
instead. That means we need to create a method returning an
`Admin::TableActionsComponent`. We also need to cache this object;
otherwise we were getting an error when calling `actions.action` from
the `Admin::Poll::Questions::TableActionsComponent`.

spec/components/admin/allowed_table_actions_component_spec.rb

@@ -0,0 +1,57 @@
+require "rails_helper"
+
+describe Admin::AllowedTableActionsComponent, controller: Admin::BaseController do
+  before do
+    sign_in(create(:administrator).user)
+    allow_any_instance_of(Admin::AllowedTableActionsComponent).to receive(:can?).and_return true
+  end
+  let(:record) { create(:banner, title: "Important!") }
+
+  it "renders edit and destroy actions by default if they're allowed" do
+    component = Admin::AllowedTableActionsComponent.new(record)
+
+    render_inline component
+
+    expect(page).to have_link count: 1
+    expect(page).to have_link "Edit"
+    expect(page).to have_button count: 1
+    expect(page).to have_button "Delete"
+  end
+
+  it "accepts an actions parameter" do
+    render_inline Admin::AllowedTableActionsComponent.new(record, actions: [:edit])
+
+    expect(page).to have_link "Edit"
+    expect(page).not_to have_button "Delete"
+  end
+
+  it "accepts custom options" do
+    render_inline Admin::AllowedTableActionsComponent.new(record, edit_text: "change", edit_path: "/myedit")
+
+    expect(page).to have_link "change", href: "/myedit"
+  end
+
+  it "accepts custom content" do
+    render_inline Admin::AllowedTableActionsComponent.new(record) do
+      "<a href='/'>Main</a>".html_safe
+    end
+
+    expect(page).to have_link count: 2
+    expect(page).to have_link "Main", href: "/"
+    expect(page).to have_link "Edit"
+
+    expect(page).to have_button count: 1
+    expect(page).to have_button "Delete"
+  end
+
+  it "only renders the allowed actions" do
+    component = Admin::AllowedTableActionsComponent.new(record)
+    allow(component).to receive(:can?).with(:edit, record).and_return true
+    allow(component).to receive(:can?).with(:destroy, record).and_return false
+
+    render_inline component
+
+    expect(page).to have_link "Edit"
+    expect(page).not_to have_button "Delete"
+  end
+end