Warning was fixed.
Remarks were applied.
- class VMap in Draw was removed
- NCollection_DataMap is used to store objects
- name of object is used to associate Tcl variable with the object
- creation and changing of objects are correclty handled
Redundant casts were removed.
Initial value is restored if variable is protected.
Tests for bug #24863 were added.
Some test cases and tcl command "save" were improved.
Useless using of upvar was removed.
