implement wxNativeFontInfo::SetFamily for wxGTK with the same logic used by wxMSW; remove the now useless m_family from wxGTK's wxFont implementation; better docs for many wxFont functions (don't use typeface term; use the 'face name' one instead) and wxFontFamily

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@60119 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

tests/font/fonttest.cpp

@@ -85,11 +85,14 @@ void FontTestCase::GetSet()
 
         // test Get/SetFamily()
 
-        test.SetFamily( wxFONTFAMILY_MODERN );
+        test.SetFamily( wxFONTFAMILY_ROMAN );
         CPPUNIT_ASSERT( test.IsOk() );
-        CPPUNIT_ASSERT_EQUAL( wxFONTFAMILY_MODERN, test.GetFamily() );
+        CPPUNIT_ASSERT( wxFONTFAMILY_ROMAN == test.GetFamily() || 
+                        wxFONTFAMILY_UNKNOWN == test.GetFamily() );
+            // note that there is always the possibility that GetFamily() returns
+            // wxFONTFAMILY_UNKNOWN so that we consider it as a valid return value
+
 
-        
         // test Get/SetEncoding()
 
         //test.SetEncoding( wxFONTENCODING_KOI8 );