Dgud/wx/fixes/otp 20335 - #11530

Handle problem if application have stopped wx, but still registers an
connect.

Was buggy for multiple uses

Returning hibernate from a callback caused a crash.

Fix copy paste docs.

Fix {shutdown, R} as a normal exit, i.e. no logging.

Cache init_opengl

Debug printout removal

Removed dead code.

Fix error cases

And other badarg checks

Could ref freed data

The test was wrong and the thread was always woken,
this might be cause issues if things is not working as expected.

PageInfo was wrong, andalso fixes memory leaks in case of other errors.

Fix several code generation bugs in wx_gen_nif.erl, wxapi.conf, and
hand-written templates:

- Fix clientData list iteration storing the whole list instead of
  per-element terms (wxeErlTerm(argv[N]) -> wxeErlTerm(Head))
- Fix wxPrintout:new title argument silently dropped (missing
  assignment and semicolon in template)
- Fix STC raw-getter use-after-free: store wxCharBuffer in local
  before calling .data() on the temporary
- Fix wxImage malloc return unchecked before memcpy
- Fix EwxListCtrl default constructor leaving me_ref uninitialized
- Fix EwxGLContext destructor not cleaning up glc map entries
- Fix wxWindow:screenToClient/1 passing uninitialized coords to
  wxWidgets (add both annotation matching clientToScreen)
- Fix wxImage GetData/GetAlpha int overflow on large images by
  casting size computation to size_t
- Fix SetFieldsCount OOB read when widths list length != number
  (added pre_hook validation)
- Fix userData leak in wxEvtHandler connect when eventType is invalid
- Move !This null check before argument decoding to prevent leaking
  heap-allocated term arguments (wxETreeItemData, wxeErlTerm)
- Remove spurious copyright block from wx_extra/wx_misc.erl template

OpenGL have not been generated in long time, still generated Xml docs,
and erldoc commetns, update generator to work as expected with newer
inline docs.