Class DBRep_DrawableShape is changed to postpone generation of display data until the shape is actually displayed (for the first time).
Test perf draw bug28404 is added.
Automatic upgrade of OCCT code by command "occt_upgrade . -nocdl":
- WOK-generated header files from inc and sources from drv are moved to src
- CDL files removed
- All packages are converted to nocdlpack