Forum improvements

Hi everyone! A few new forum improvements to share:

• Read while replying: Use the new split-view button to keep the post or private conversation beside your reply editor. On phones, it appears above the editor, and each pane scrolls independently.
• Likes in private messages: You can now give a private message a thumbs-up. I got tired of having to write out a message just to acknowledge a brief response :)
• Message notifications: Private messages now appear alongside your other forum notifications. I'm about to add a "mark all read" button as I realize now that I had a ton of old messages that were unread and many of you may have the same issue. Hang tight.
• Easier follow-ups: Counts in the Read tab help you spot private messages still awaiting your reply.
• A tidier editor: The toolbar stays on one row, with extra tools under … when space is tight. Group recipient lists are also more compact while replying.

Give these a try and let me know how they feel, especially our phone users.