Added wxBookCtrlBase::FindPage().

Add helper function to find the index of the given page.

Closes #15125.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@73734 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
Minor documentation corrections in wxBookCtrlBase.

Use the correct preposition in "set selection to the given page".

See #15125.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@73735 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
Mention the relationship of wxDocument::Activate() with Raise().

Also provide an example of a custom overridden Raise().

See #15120.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@73736 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
Fix program not shutting down when using Ubuntu app menu.

Ensure that an idle event is generated after a menu event even when the latter
comes, via DBUS, from the out of process app menu and not from a real GTK menu.

Closes #15122.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@73737 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775