Fix creating broken direct chat for user with a direct chat already open

Just enter the existing room instead of trying to create a new one but
broken.

Fix !237


(cherry picked from commit 0dbb56ba1e)

imports/NeoChat/Dialog/UserDetailDialog.qml

@@ -133,7 +133,7 @@ Kirigami.OverlaySheet {
                 text: i18n("Open a private chat")
                 icon.name: "document-send"
                 onTriggered: {
-                    Controller.activeConnection.requestDirectChat(user)
+                    Controller.openOrCreateDirectChat(user);
                     root.close()
                 }
             }