Use wxBufferedPaintDC to implement double buffering in wxPG.

This also fixes drawing the PG when buffer is not available and there is necessary do draw directly on window DC.
wxPropertyGrid::DrawItems method is simplified and wxPropertyGrid::DoDrawItems method is reimplemented since its 3-rd argument (isBuffered) is unneeded anymore.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@78266 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
Create wxPropertyGridManager with default size in the propgrid sample

Since r78150 wxPropertyGridManager can be created with default size with no issues.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@78267 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
Fix typo in a comment

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@78268 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
Remove unused member variable from wxSimpleCheckBox (used in wxPGCheckBoxEditor).

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@78269 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
Merge branch 'master' of ../wxWidgets_vanilla_trunk-svn into merge
sync with upstream (SVN); patched for ICC; removed files we do not support

Signed-off-by: Marian 'VooDooMan' Meravy <vdm113@gmail.com>
restore our project files

Signed-off-by: Marian 'VooDooMan' Meravy <vdm113@gmail.com>
restore our git and script files

Signed-off-by: Marian 'VooDooMan' Meravy <vdm113@gmail.com>
update "setup.h"

Signed-off-by: Marian 'VooDooMan' Meravy <vdm113@gmail.com>
Allow setting icon before m_widget is valid.
There is no need to require a valid m_widget,
the "realize" handler will take care of things later.
Closes #16731


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@78270 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
No real changes, just fixed a couple of typos in comments, fixes #16726.


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@78271 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
Merge branch 'master' of ../wxWidgets_vanilla_trunk-svn into merge
sync with upstream (SVN); patched for ICC; removed files we do not support

Signed-off-by: Marian 'VooDooMan' Meravy <vdm113@gmail.com>
restore our project files

Signed-off-by: Marian 'VooDooMan' Meravy <vdm113@gmail.com>
restore our git and script files

Signed-off-by: Marian 'VooDooMan' Meravy <vdm113@gmail.com>