fix bug 870526 - add topic filters based on tags.

Show current search query in global search form input.

Purge page parameters from select or deselect URLs.

Added topic filter feature to redesign template.

Updated kuma-lib

Passed a string version of the page parameter when popping it since that's what the URLObject query object contains.
Merge pull request #1371 from groovecoder/search-topic-filter-870526

fix bug 870526 - add topic filters based on tags.