TBTR: Fix display of vehicle sprites for some NewGRFs, fix issues in large UI modes

Slight code, GUI layout, and savegame format tidying

src/train_cmd.cpp

@@ -4223,8 +4223,6 @@ Train* CmdBuildVirtualRailVehicle(EngineID eid, bool lax_engine_check, StringID
 		train_part->SetVirtual();
 	}
 
-	v->UpdateViewport(true, false);
-
 	v->ConsistChanged(CCF_ARRANGE);
 
 	CheckConsistencyOfArticulatedVehicle(v);