Really fix setting fonts in RichEdit 4.1 controls.

Really fix setting fonts in RichEdit 4.1 controls.

The fix applied in r64394 wasn't enough and the control could still decide to
overwrite the font used by default when non-ASCII characters were inserted
into it. To really force it to use the font we want we apparently must send it
EM_SETCHARFORMAT with SCF_ALL flag (MSDN also documents SCF_DEFAULT but it's
not clear if we should use it instead or together with SCF_ALL, for now it
doesn't seem to be necessary).

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@65565 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775