Generate text events in generic wxSpinCtrl itself.

Generate text events in generic wxSpinCtrl itself.

The text events in a wxSpinCtrl should originate from the control itself but
they were just propagated upwards from wxTextCtrl embedded into it and hence
had wrong event object and event ID fields.

Fix this by making EVT_TEXT come from wxSpinCtrl itself, in addition to
EVT_TEXT_ENTER ones which we already forwarded like this.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@72648 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775