implement deleting lists

re: sk22#30

mastodon/src/main/res/values/strings_sk.xml

@@ -151,6 +151,8 @@
     <string name="sk_list_replies_policy_list">List members</string>
     <string name="sk_list_replies_policy_followed">Any followed user</string>
     <string name="sk_list_replies_policy_none">No one</string>
+    <string name="sk_delete_list">Delete list</string>
+    <string name="sk_delete_list_confirm">Are you sure you want to delete this list?</string>
 
     <!--    accessibility labels-->
     <string name="sk_poll_option_add">Add new poll option</string>