Implement wxBookCtrlBase::CalcSizeFromPage() in the base class.

Implement wxBookCtrlBase::CalcSizeFromPage() in the base class.

The definition of this method was needlessly duplicated in all of
wx{Choice,List,Tool,Tree}book and in all of them except the first one it
didn't account correctly for the case when the size of the controller was
greater than the size of the page.

Avoid the duplication and fix the best size determination in such case by
providing a single, correct version of the function in the base class itself.

Closes #11793.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@63632 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775