VC6 has very poor support for template functions and in particular doesn't
understand explicitly choosing the type of the function to call so replace
template DoApplyToFont() function with FontModifier template class in
wxMarkupParserAttrOutput implementation.
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@67073 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
wxMarkupText is a private class that implements generic handling of markup
strings, i.e. can measure them and render them onto a wxDC.
This class will be used for markup support in wxMSW wxButton.
Also add wxMarkupParserAttrOutput which will be useful for other wxMarkupText
implementations.
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@67064 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775