Generate better DOM id when form has no object

Prefer `title_hint` over `_title_hint` for forms without an object

Author: koppen

app/components/flowbite/input_field.rb

@@ -189,7 +189,13 @@ def hint?
     end
 
     def id_for_hint_element
-      "#{@form.object_name}_#{@attribute}_hint"
+      [
+        @form.object_name,
+        @attribute,
+        "hint"
+      ]
+        .compact_blank
+        .join("_")
     end
 
     # @return [Hash] The keyword arguments for the input component.

test/components/flowbite/input_field_test.rb

@@ -175,14 +175,14 @@ def test_renders_a_hint
   def test_adds_aria_attributes_for_hint
     render_inline(Flowbite::InputField.new(form: @form, attribute: :title, hint: {content: "What's the title?"}))
 
-    assert_selector("input[aria-describedby='_title_hint']")
-    assert_selector("p#_title_hint", text: "What's the title?")
+    assert_selector("input[aria-describedby='title_hint']")
+    assert_selector("p#title_hint", text: "What's the title?")
   end
 
   def test_adds_extra_attributes_to_hint
     render_inline(Flowbite::InputField.new(form: @form, attribute: :title, hint: {content: "What's the title?", options: {class: "custom-hint-class"}}))
 
-    assert_selector("p#_title_hint.custom-hint-class", text: "What's the title?")
+    assert_selector("p#title_hint.custom-hint-class", text: "What's the title?")
   end
 
   def test_renders_an_input_element