kwc/render: don't empty GET and REQUEST
kwc/render: don't empty GET and REQUEST

this allows using parameters like:
/kwf/util/kwc/render?url=...&foo=123
and not just as part of url:
/kwf/util/kwc/render?url=...%26foo=123

Ben-Ho/koala-framework,kaufmo/koala-framework,koala-framework/koala-framework,kaufmo/koala-framework,nsams/koala-framework,yacon/koala-framework,nsams/koala-framework,kaufmo/koala-framework,Sogl/koala-framework,Sogl/koala-framework,nsams/koala-framework,yacon/koala-framework,koala-framework/koala-framework,yacon/koala-framework,Ben-Ho/koala-framework