Backported part of r75124: Generalised wxRICHTEXT_CHANGE_OBJECT command so it can now apply to a paragraph as well as an object within a paragraph.


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/WX_3_0_BRANCH@75222 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775