Add ability to change the "Send message" button text and hide preview button

+++ b/contact_storage.module
@@ -24,6 +24,12 @@ function contact_storage_form_contact_form_form_alter(&$form, FormStateInterface
+    '#default_value' => $contact_form->getThirdPartySetting('contact_storage', 'submit_text', FALSE),

here should be default value somehow

+++ b/contact_storage.module
@@ -32,6 +38,7 @@ function contact_storage_form_contact_form_form_alter(&$form, FormStateInterface
+  $contact_form->setThirdPartySetting('contact_storage', 'submit_text', $form_state->getValue('contact_storage_submit_text'));

You need a schema change for this

Also, needs tests.

I assingned this myself as a part of #TCSHackthon.

Issue has been fixed please review

Will be reviewing it in next 30mins.

Hey this works, I installed the required module and applied the patch. The submit button text is as specified while creating the form.

Looks good to me.

#drupalconasia2016

@ultimike Thanks for providing patch.

I have tested this patch at my end and found that there is issue with the test cases in ContactStorageTest.php at line number 77.
Please find attached new updated patch to resolve this issue.

1. +++ b/contact_storage.module
   @@ -39,6 +46,13 @@ function contact_storage_contact_form_form_builder($entity_type, ContactFormInte
   + ¶
   

   whitespace issue here

2. +++ b/src/Tests/ContactStorageTest.php
   @@ -66,16 +66,15 @@ class ContactStorageTest extends ContactStorageTestBase {
   +    // Make sure the stored message is corresct.
   

   unneeded change

3. +++ b/src/Tests/ContactStorageTest.php
   @@ -66,16 +66,15 @@ class ContactStorageTest extends ContactStorageTestBase {
   -    $this->drupalPostForm(NULL, array(), t('Save'));
   -    $this->assertUrl('admin/structure/contact/messages');
   -
   +    $this->drupalPostForm('admin/structure/contact/messages', array(), $headers = array(), $form_html_id =NULL, t('Save'));
   +    $this->assertUrl('admin/structure/contact/messages',[]);
   

   Unneeded changes

Working on this