Merge pull request #165 from ASCWebServices/canini

new custom module

web/modules/custom/book_settings_changes/book_settings_changes.info.yml

+name: Book Settings Changes
+description: 'Validates node and changes Book outline settings'
+core: 8.x
+type: module
+package: ASC Tech
+
+libraries:
+  - 'book_settings_changes/global-styling'

web/modules/custom/book_settings_changes/book_settings_changes.libraries.yml

+# book_settings_changes.libraries.yml
+custom_css:
+  version: 1.x
+  css:
+    theme:
+      css/styles.css: {}

web/modules/custom/book_settings_changes/book_settings_changes.module

+<?php
+function book_settings_changes_form_alter(&$form, &$form_state, $form_id) {
+  $form['book']['#title'] = t('Newsletter outline');
+  $form['book']['bid']['#title'] = t('Newsletter');
+  $form['book']['bid']['#description'] = t('Your page will be a part of the selected newsletter.');
+  $form['book']['parent_depth_limit']['#value'] = 2;
+  //$form['book']['pid']['#prefix'] = '<div id="edit-book-plid-wrapper"><em>' . t('No newsletter selected.') . '</em></div>';
+  $form['book']['bid']['#options']['new'] = t('- Create a new newsletter -');
+}
+
+function book_settings_changes_page_attachments(array &$page) {
+  $page['#attached']['library'][] = 'book_settings_changes/custom_css';
+}

web/modules/custom/book_settings_changes/css/styles.css

+/* Hides unneeded descriptive text */
+#edit-book-plid-wrapper em {
+  display: none;
+}
+
+#edit-book-plid-wrapper .description {
+  display: none;
+}