don't allow to clear project when the lock is set, or when onelab is busy

Fltk/graphicWindow.cpp

@@ -170,6 +170,10 @@ static void file_open_recent_cb(Fl_Widget *w, void *data)
 
 static void file_clear_cb(Fl_Widget *w, void *data)
 {
+  if(CTX::instance()->lock || FlGui::instance()->onelab->isBusy()) {
+    Msg::Info("I'm busy! Ask me that later...");
+    return;
+  }
   ClearProject();
   onelab_cb(0, (void*)"reset"); // this will call OpenProject
   drawContext::global()->draw();
@@ -543,6 +547,11 @@ static void geometry_edit_cb(Fl_Widget *w, void *data)
 
 void geometry_reload_cb(Fl_Widget *w, void *data)
 {
+  if(CTX::instance()->lock || FlGui::instance()->onelab->isBusy()) {
+    Msg::Info("I'm busy! Ask me that later...");
+    return;
+  }
+
   std::string fileName = GModel::current()->getFileName();
   ClearProject();