fix(HeadlineEditor): Fix anchor position

The necessary css class was not present because we asked for many instead of any.

But the level select is always present, just disabled for a single option

Author: tvdeyen

app/components/alchemy/ingredients/headline_editor.rb

@@ -61,7 +61,7 @@ def input_field
 
       def css_classes
         super + [
-          has_level_select? ? "with-level-select" : nil,
+          level_options.any? ? "with-level-select" : nil,
           has_size_select? ? "with-size-select" : nil
         ].compact
       end

spec/components/alchemy/ingredients/headline_editor_spec.rb

@@ -41,10 +41,10 @@
     is_expected.to have_selector("sl-tooltip[content='Level']")
   end
 
-  context "and having many level options" do
+  context "and having any level options" do
     before do
       allow(headline_editor).to receive(:level_options) do
-        [["H1", 1], ["H2", 2]]
+        [["H1", 1]]
       end
     end