A few $Id$ references remained after commit
3f66f6a5b3 or appeared in newly added files.
Remove the lines containing svn keywords except when it concerns
third-party files. In that case keep the line as-is or collapse it to the
keyword if it had been expanded to contain wx commit information (only
occurs with src/zlib/ChangeLog).
This is a simple high level helper combining an arbitrary control showing
multiple items with the buttons allowing to add items to and remove items from
this control, but using the buttons and the layout appropriate for the current
platform.
Add the implementation itself, an example of using it to the dialogs sample
and the documentation.
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@78462 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
