messagingview: do not show busy view for SIP account

Change-Id: Ic88c6fae808a97fc357e1168d4e9f4ac72aa73ab
GitLab: #1026

src/mainwindow.cpp

@@ -2492,10 +2492,10 @@ void
 CppImpl::slotShowLeaveMessageView(lrc::api::conversation::Info conv)
 {
     auto* current_view = gtk_bin_get_child(GTK_BIN(widgets->frame_call));
-    if (IS_INCOMING_CALL_VIEW(current_view)) {
+    if (IS_INCOMING_CALL_VIEW(current_view)
+        && accountInfo_->profileInfo.type != lrc::api::profile::Type::SIP)
         incoming_call_view_let_a_message(INCOMING_CALL_VIEW(current_view), conv);
 }
-}
 
 void
 CppImpl::slotShowCallView(const std::string& id, lrc::api::conversation::Info origin)