wx: Fix api generator

Be usable with doxygen 1.8.3
wx: Fix bug in wxStatusBar:getFieldRect/2
Export type zlib:zstream/0

Terms of this type are returned and sometimes sit in states.
Exporting it allows us to properly track the types there.
wx: Add wxClipboardTextEvent
wx: Add wxPanel:setFocusIgnoringChildren/1

It was missing and needed
wx: Add character event test/example
wx: Add toolbar testcase
Updated preloaded
mnesia: Cleanup and remove obsolete code

We don't support communicating with such old nodes anyway.
mnesia: Improve checkpoint tests
mnesia: Improve checkpoint activation

Fixed a race where some parts of a transaction could
be added to the checkpoint.

There are probably more races here but this improves the current
testcases.
mnesia: Checkpoint fix

Avoid hanging waiting for other processes on other node
to commit.
Merge branch 'dgud/mnesia/checkpoint-init/OTP-10957' into maint

* dgud/mnesia/checkpoint-init/OTP-10957:
  mnesia: Checkpoint fix
  mnesia: Improve checkpoint activation
  mnesia: Improve checkpoint tests
  mnesia: Cleanup and remove obsolete code
Merge branch 'dgud/wx/update-doxygen/OTP-11279' into maint

* dgud/wx/update-doxygen/OTP-11279:
  wx: Add toolbar testcase
  wx: Add character event test/example
  wx: Add wxPanel:setFocusIgnoringChildren/1
  wx: Add wxClipboardTextEvent
  wx: Fix bug in wxStatusBar:getFieldRect/2
  wx: Fix api generator
Merge branch 'essen/export-zlib-zstream/OTP-11278' into maint

* essen/export-zlib-zstream/OTP-11278:
  Updated preloaded
  Export type zlib:zstream/0