1. Listbox can only show selected item
2. Don't lost previous query parameter in filter&sort editor

1. use QueryFactory to process query in filter editor and listbox
2. add draft support for sort editor
3. add layout for hide rows functionality in listbox

Still non-UTF-8 bytes will be lost, but better than nothing for debugging purpose.

This will ease debugging from posted test results.
This code should be synchronous (no Blob asDataURL method for example) and so, btoa is used.

Sadly, btoa will fail with unicode character
Do not report HTML error in such case, until a cleaner dataURL is implemented