redesigned the Query tab
add query hints & tips
fixed query selection and state management issues
fixed sorting issue
moved query logic into the main configuration object
bumped revision to 0.18.8
added new item for v0.18.8 to "What's New"
clean up
cleanup and updates
optimizing performance through the use of caching
should only retrieve decoders for the topic we care about
renamed method
added new items to "What's New" for v0.18.8