Channel chat: Add edit message (#9035)

**Summary**:
- Removed reply message from message_menu
- Made render_popover_buttons a bit more reusable
- Fixed issue that you can't close the reply/edit preview when you are
not focusing the message editor
- Notify only the new people that were mentioned inside the edited
message

**Follow up**
- Fix that we update the notification message for the people that we
mentioned already
- Fix that we remove the notification when a message gets deleted.
  - Fix last acknowledge message id is in correct now

**Todo**:
- [x] Add tests
- [x] Change new added bindings to the `Editor::Cancel` event.

Release Notes:

- Added editing of chat messages
([#6707](https://github.com/zed-industries/zed/issues/6707)).

<img width="239" alt="Screenshot 2024-03-09 at 11 55 23"
src="https://github.com/zed-industries/zed/assets/62463826/b0949f0d-0f8b-43e1-ac20-4c6d40ac41e1">
<img width="240" alt="Screenshot 2024-03-13 at 13 34 23"
src="https://github.com/zed-industries/zed/assets/62463826/d0636da2-c5aa-4fed-858e-4bebe5695ba7">

---------

Co-authored-by: Bennet Bo Fenner <53836821+bennetbo@users.noreply.github.com>
Co-authored-by: Conrad Irwin <conrad.irwin@gmail.com>

crates/rpc/proto/zed.proto

@@ -203,7 +203,9 @@ message Envelope {
         CompleteWithLanguageModel complete_with_language_model = 166;
         LanguageModelResponse language_model_response = 167;
         CountTokensWithLanguageModel count_tokens_with_language_model = 168;
-        CountTokensResponse count_tokens_response = 169; // current max
+        CountTokensResponse count_tokens_response = 169;
+        UpdateChannelMessage update_channel_message = 170;
+        ChannelMessageUpdate channel_message_update = 171;  // current max
     }
 
     reserved 158 to 161;
@@ -1184,6 +1186,14 @@ message RemoveChannelMessage {
     uint64 message_id = 2;
 }
 
+message UpdateChannelMessage {
+    uint64 channel_id = 1;
+    uint64 message_id = 2;
+    Nonce nonce = 4;
+    string body = 5;
+    repeated ChatMention mentions = 6;
+}
+
 message AckChannelMessage {
     uint64 channel_id = 1;
     uint64 message_id = 2;
@@ -1198,6 +1208,11 @@ message ChannelMessageSent {
     ChannelMessage message = 2;
 }
 
+message ChannelMessageUpdate {
+    uint64 channel_id = 1;
+    ChannelMessage message = 2;
+}
+
 message GetChannelMessages {
     uint64 channel_id = 1;
     uint64 before_message_id = 2;
@@ -1229,6 +1244,7 @@ message ChannelMessage {
     Nonce nonce = 5;
     repeated ChatMention mentions = 6;
     optional uint64 reply_to_message_id = 7;
+    optional uint64 edited_at = 8;
 }
 
 message ChatMention {

crates/rpc/src/proto.rs

@@ -149,6 +149,7 @@ messages!(
     (CallCanceled, Foreground),
     (CancelCall, Foreground),
     (ChannelMessageSent, Foreground),
+    (ChannelMessageUpdate, Foreground),
     (CompleteWithLanguageModel, Background),
     (CopyProjectEntry, Foreground),
     (CountTokensWithLanguageModel, Background),
@@ -244,6 +245,7 @@ messages!(
     (ReloadBuffersResponse, Foreground),
     (RemoveChannelMember, Foreground),
     (RemoveChannelMessage, Foreground),
+    (UpdateChannelMessage, Foreground),
     (RemoveContact, Foreground),
     (RemoveProjectCollaborator, Foreground),
     (RenameChannel, Foreground),
@@ -358,6 +360,7 @@ request_messages!(
     (ReloadBuffers, ReloadBuffersResponse),
     (RemoveChannelMember, Ack),
     (RemoveChannelMessage, Ack),
+    (UpdateChannelMessage, Ack),
     (RemoveContact, Ack),
     (RenameChannel, RenameChannelResponse),
     (RenameProjectEntry, ProjectEntryResponse),
@@ -442,7 +445,9 @@ entity_messages!(
 entity_messages!(
     {channel_id, Channel},
     ChannelMessageSent,
+    ChannelMessageUpdate,
     RemoveChannelMessage,
+    UpdateChannelMessage,
     UpdateChannelBuffer,
     UpdateChannelBufferCollaborators,
 );