Im using FB messenger in Opera browser sidebar and Search in Conversation still not there even after another update, This morning i had a popup message claiming other features will soon be going too, due to some new EU law and "not to worry we will try to get them back", Losing the search in conversation is a real pain as i used it alot.
Another problem i have, With the right hand option sidebar open in FB messenger if i send a photo to someone it chops the chat window in half [I can only see down the right hand side of the chat], the other half looks like it is hidden [stretching the chat window out makes no difference], I have to click the I to remove the left sidebar options off to be able to see all the chat.
I can tell you now that this has Zero to do with EU policies because a simple tweak can remove it just for those users and keep it in for others. If it had to do with EU policies then it would have been removed from the app, they just want users to download the app because it gives them more ability to send 'personalized' advertising.
As to the carriage return, they moved it to Shift+Enter in messenger, which is rather dumb considering its still Ctrl+Enter in the posting side.