Support using the same numeric-valued metatag twice in the same search. Numeric-valued metatags are those taking an integer, float, filesize, or date argument. Previously using the same metatag twice would cause the second metatag to overwrite the first metatag. Examples: * "id:>5 id:<10" * "width:>500 width:<1000" * "date:>2019-01-01 date:<2020-01-01"