Make wxToolBar accept first mouse clicks. That is, clicking on a toolbar

Make wxToolBar accept first mouse clicks.  That is, clicking on a toolbar
tool when the window is inactive will both activate the window and cause
the tool to be clicked.
TODO: User should be provided a way to override this behavior.  The Apple HIG
are basically that "dangerous" tools (like delete) should not function
on an inactive window.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@35731 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775