Added wxBITMAP_TYPE_TIFF and wxBITMAP_TYPE_TIFF_RESOURCE.
Having wxBITMAP_TYPE_TIFF and wxBITMAP_TYPE_TIFF_RESOURCE is more consistent with already using the complete short name of an image format elsewhere (e.g. wxBITMAP_TYPE_JPEG, not wxBTMAP_TYPE_JPG, and wxTIFFHandler as opposed to wxTIFHandler). Renamed all existing occurrences and kept the old enum values for backwards compatibility.
Also renamed occurrences of wxBITMAP_TYPE_RESOURCE to the already existing wxBITMAP_TYPE_BMP_RESOURCE.
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@68859
c3d73ce0-8a6f-49c7-b76d-
6d57e0e08775