Add follow button to detailed status, add gradient to mask bio cut-off (#7979)

* Add follow button to detailed status, add gradient to mask bio cut-off

* In landing strip, show sign up link even if closed (different href)

Point to joinmastodon.org

app/views/remote_follow/new.html.haml

@@ -16,4 +16,4 @@
     .actions
       = f.button :button, t('remote_follow.proceed'), type: :submit
 
-    %p.hint.subtle-hint= t('remote_follow.no_account_html', sign_up_path: open_registrations? ? new_user_registration_path : 'https://joinmastodon.org')
+    %p.hint.subtle-hint= t('remote_follow.no_account_html', sign_up_path: open_registrations? ? new_user_registration_path : 'https://joinmastodon.org/#getting-started')

app/views/shared/_landing_strip.html.haml

@@ -3,6 +3,4 @@
 
   %div
     = t('landing_strip_html', name: content_tag(:span, display_name(account, custom_emojify: true), class: :emojify), link_to_root_path: link_to(content_tag(:strong, site_hostname), root_path))
-
-    - if open_registrations?
-      = t('landing_strip_signup_html', sign_up_path: new_user_registration_path)
+    = t('landing_strip_signup_html', sign_up_path: open_registrations? ? new_user_registration_path : 'https://joinmastodon.org/#getting-started')

app/views/stream_entries/_detailed_status.html.haml

@@ -7,7 +7,7 @@
       %strong.p-name.emojify= display_name(status.account, custom_emojify: true)
       %span= acct(status.account)
 
-  - if embedded_view?
+  - if !user_signed_in? || embedded_view?
     = link_to account_remote_follow_path(status.account), class: 'button button-secondary logo-button', target: '_new' do
       = render file: Rails.root.join('app', 'javascript', 'images', 'logo.svg')
       = t('accounts.follow')