FEATURE: add new user option skip_new_user_tips. (#10437)

And add new site setting `default_other_skip_new_user_tips` in user preferences category.

test/javascripts/fixtures/session-fixtures.js

@@ -29,7 +29,8 @@ export default {
       dismissed_banner_key: null,
       akismet_review_count: 0,
       title_count_mode: "notifications",
-      timezone: "Australia/Brisbane"
+      timezone: "Australia/Brisbane",
+      skip_new_user_tips: false
     }
   }
 };

test/javascripts/fixtures/user_fixtures.js

@@ -176,6 +176,7 @@ export default {
       new_topic_duration_minutes: 1440,
       external_links_in_new_tab: false,
       dynamic_favicon: true,
+      skip_new_user_tips: false,
       enable_quoting: true,
       muted_category_ids: [],
       tracked_category_ids: [],
@@ -2641,6 +2642,7 @@ export default {
         email_level: 1,
         external_links_in_new_tab: false,
         dynamic_favicon: false,
+        skip_new_user_tips: false,
         enable_quoting: true,
         digest_after_minutes: 10080,
         automatically_unpin_topics: true,
@@ -2951,6 +2953,7 @@ export default {
         email_messages_level: 0,
         external_links_in_new_tab: false,
         dynamic_favicon: false,
+        skip_new_user_tips: false,
         enable_quoting: true,
         enable_defer: false,
         digest_after_minutes: 1440,