fix: Chat message form not preserved on edit message - EXO-70366

Before this change, when send a message which has several line breaks and edit the message, on edit, the message form isn't displayed. After this change, on edit, the message form should be maintained.

(cherry picked from commit 2c239dc)

application/src/main/webapp/vue-app/components/ExoChatMessageComposer.vue

@@ -173,6 +173,7 @@ export default {
     document.addEventListener(chatConstants.ACTION_MESSAGE_DELETE, this.putFocusOnComposer);
     document.addEventListener(chatConstants.ACTION_MESSAGE_QUOTE, this.quoteMessage);
     this.$root.$on('edit-chat-message', messageToEdit => {
+      messageToEdit.msg = messageToEdit.msg.replaceAll('\n','<br>');
       this.chatMessage = messageToEdit;
       this.$refs.messageComposerArea.innerHTML = this.chatMessage.msg;
       this.putFocusOnComposer();