added ':' support to VariantParser, given it' s used by export.cfg

core/variant_parser.cpp

@@ -1615,6 +1615,9 @@ Error VariantParser::_parse_tag(Token& token, Stream *p_stream, int &line, Strin
 		if (parsing_tag && token.type==TK_PERIOD) {
 			r_tag.name+="."; //support tags such as [someprop.Anroid] for specific platforms
 			get_token(p_stream,token,line,r_err_str);
+		} else if (parsing_tag && token.type==TK_COLON) {
+			r_tag.name+=":"; //support tags such as [someprop.Anroid] for specific platforms
+			get_token(p_stream,token,line,r_err_str);
 		} else {
 			parsing_tag=false;
 		}