Add filteredItems to queryList

[k-simons]

Changes proposed in this pull request:

• Add filtered items to the queryList rendered callback
• Biggest issue without exposing it, is that if you implement itemListPredicate that changes the sortOrder, than you will be unable to use the raw items because those are un-sorted. So rendering will not match arrow-up / arrow-down
• I don't know how to best solve this for select... if some implements a itemListPredicate that changes order for Select it will be broken. We could change the select to use filteredItems instead of items for their itemRenderer however that would limit people who want to do something with items that do not match the filter
• @giladgray for SA

Reviewers should focus on:

Screenshot

[giladgray]

@k-simons i'm going to pick up this feature as it's dear to my own heart, and i don't think this PR is enough to fully resolve the issue (esp given recent related PRs #2245 #2080). thanks for the submission!