Allow users to disable and clear (You)s

Credit to based anon https://leftypol.org/tech/res/6724.html#12776

js/show-own-posts.js

@@ -17,6 +17,28 @@
 
 +function(){
 
+if (typeof localStorage.own_posts_tracking === 'undefined') {
+  localStorage.own_posts_tracking = 'true'; // set default
+}
+
+const addgui = function () {
+  if (!(window.Options && Options.get_tab ('general'))) { return; }
+  const prefix = "showownposts_";
+  const gui = '<fieldset><legend>(You)s</legend>'
+    + '<label><input type="checkbox" id="' + prefix + 'track">' + _('Track future (You)s') + '</label>'
+    + ' <button id="' + prefix + 'clear" title="' + _('Reload the page to see the effect') + '">' + _('Clear all (You)s') + '</button>'
+    + '</fieldset>';
+  Options.extend_tab ("general", gui);
+  const cb = Options.get_tab ('general').content.find ('#' + prefix + 'track');
+  cb.prop ('checked', localStorage.own_posts_tracking === 'true');
+  cb.on ("change", function (ev) {
+    const cb = ev.target;
+    localStorage.own_posts_tracking = cb.checked ? 'true' : 'false';
+  });
+  Options.get_tab ('general').content.find ('#' + prefix + 'clear').on ("click", function () {
+    localStorage.own_posts = '{}';
+  });
+}
 
 var update_own = function() {
   if ($(this).is('.you')) return;
@@ -61,9 +83,11 @@ $(function() {
   board = $('input[name="board"]').first().val();
 
   update_all();
+  addgui();
 });
 
 $(document).on('ajax_after_post', function(e, r) {
+  if (localStorage.own_posts_tracking !== 'true') { return; }
   var posts = JSON.parse(localStorage.own_posts || '{}');
   posts[board] = posts[board] || [];
   posts[board].push(r.id);