do not capitalize letter right after the apostrophe

src/tag_editor.cpp

@@ -1007,7 +1007,7 @@ std::string TagEditor::CapitalizeFirstLetters(const string &s)
 		result[0] = toupper(result[0]);
 	for (string::iterator it = result.begin()+1; it != result.end(); it++)
 	{
-		if (isalpha(*it) && !isalpha(*(it-1)))
+		if (isalpha(*it) && !isalpha(*(it-1)) && *(it-1) != '\'')
 			*it = toupper(*it);
 	}
 	return result;