refactor: the Sonar remarks on the small fixes taken care of

- the log stops through a flag kept in a function, not a global one
- the messages are put together with std::format
- a vehicle dropped on a trainset in the launcher goes in once the
  trainset is drawn, so the vehicles are gone through with a plain loop
  again; the drop split into a new vehicle and a moved one
- the scenario that can't be opened is caught as the runtime error it
  is, a file name outside of the code page as the system error it is
- a track of an unknown type is left out through the pointer owning it
- the keyword of a track type written out by a function of its own
- the picked node forgotten with ranges::replace_if, the empty
  Forget_Node of the base renderer told why it is empty
- FileCased takes the path it works on

rendering/openglrenderer.cpp

@@ -1894,7 +1894,7 @@ opengl_renderer::Forget_Node( scene::basic_node const *Node ) {
     if( m_picksceneryitem == Node ) {
         m_picksceneryitem = nullptr;
     }
-    std::replace_if( m_picksceneryitems.begin(), m_picksceneryitems.end(), [Node]( scene::basic_node const *Item ) { return Item == Node; }, nullptr );
+    std::ranges::replace_if( m_picksceneryitems, [Node]( scene::basic_node const *Item ) { return Item == Node; }, nullptr );
 }
 
 void