Scroll to bottom when the form mode changes

boards/static/js/form.js

@@ -36,8 +36,10 b' function swapForm() {'
         compactForm.find('textarea')[0].value = oldText;
     }
     isCompact = !isCompact;
+    
+    scrollToBottom();
 }
 
 if (compactForm.length > 0) {
     fullForm.toggle();
-}
  No newline at end of file
+}

boards/static/js/thread.js

@@ -51,4 +51,9 b' function addQuickReply(postId) {'
     $("html, body").animate({ scrollTop: $(textAreaId).offset().top }, "slow");
 }
 
+function scrollToBottom() {
+    var $target = $('html,body');
+    $target.animate({scrollTop: $target.height()}, 1000);
+}
+
 $('#full-form').toggle();

boards/static/js/thread_update.js

@@ -100,8 +100,7 b' function updateThread() {'
             loading = false;
 
             if (bottom) {
-                var $target = $('html,body');
-                $target.animate({scrollTop: $target.height()}, 1000);
+                scrollToBottom();
             }
 
             var hasPostChanges = (updatedPosts.length > 0)