issue2550795: @dispname query args in page.html search links not valid html. Some queries with names that include spaces are not properly url encoded/quoted. I.E. a space should be replaced with %20. Fixes to allow a url_query method to be applied to HTMLStringProperty to properly quote string values passed as part of a url.

#!/usr/bin/env python
import zlib, base64, sys
print base64.encodestring(zlib.compress(sys.stdin.read()))