Convert PasswordFields to GovukPasswordFields

Converts them directly in the following forms:
- LoginForm
- ConfirmPasswordForm

Changes the password function to return
GovukPasswordField instead of PasswordField which
effects the following forms:
- RegisterUserForm
- RegisterUserFromInviteForm
- RegisterUserFromOrgInviteForm
- NewPasswordForm
- ChangePasswordForm

It also updates StringField on RegisterUserFromOrgInviteForm
to GovukTextInputField

Also includes changes to templates that use this
form and associated tests.

tests/app/main/views/organisations/test_organisation.py

@@ -1132,8 +1132,8 @@ def test_confirm_update_organisation_with_incorrect_password(
     page = BeautifulSoup(response.data.decode('utf-8'), 'html.parser')
 
     assert normalize_spaces(
-        page.select_one('.error-message').text
-    ) == 'Invalid password'
+        page.select_one('.govuk-error-message').text
+    ) == 'Error: Invalid password'
 
 
 def test_confirm_update_organisation_with_name_already_in_use(

tests/app/main/views/test_register.py

@@ -458,8 +458,8 @@ def test_cannot_register_with_sms_auth_and_missing_mobile_number(
 
     assert response.status_code == 200
     page = BeautifulSoup(response.data.decode('utf-8'), 'html.parser')
-    err = page.select_one('.error-message')
-    assert err.text.strip() == 'Cannot be empty'
+    err = page.select_one('.govuk-error-message')
+    assert err.text.strip() == 'Error: Cannot be empty'
     assert err.attrs['data-error-label'] == 'mobile_number'
 
 

tests/app/main/views/test_sign_in.py

@@ -18,7 +18,7 @@ def test_render_sign_in_template_for_new_user(
     assert page.select_one('#email_address')['value'] == ''
     assert page.select_one('#email_address')['autocomplete'] == 'email'
     assert normalize_spaces(page.select('label')[1].text) == 'Password'
-    assert page.select_one('#password')['value'] == ''
+    assert page.select_one('#password').get('value') is None
     assert page.select_one('#password')['autocomplete'] == 'current-password'
     assert page.select('main a')[0].text == 'create one now'
     assert page.select('main a')[0]['href'] == url_for('main.register')