- new function SCH_SHEET_LIST::SortByPageNumbers() which uses SCH_SHEET::ComparePageNum for the sorting algorithm
- SortByPageNumbers() is called after every call to BuildSheetList()
The groundwork has now been laid for per sheet instance data. Initially
this only supports sheet page numbers but could be expanded to include
other per sheet instance information.
ADDED: Support for user defined schematic page numbers.
When creating an unique filename to plot a subsheet, the subdirectory name is
used to create the unique filename, but should not be used as a directory,
otherwise the plot file is not created at the right place (and sometimes
cannot be created)