GitLab

TestExpectations polish

Changed query ui into queries + filters
Added flaky tests query
Select all shortcut now selects only expectations.
Fixed sorting bug (dirs and files were mixed)
Speedup startup, and query display

Bug: 726520
Change-Id: I9356455c02e70424ae1e98901fe0e5f56ed675df
Reviewed-on: https://chromium-review.googlesource.com/580827
Commit-Queue: Aleks Totic <atotic@chromium.org>
Reviewed-by: Quinten Yearsley <qyearsley@chromium.org>
Cr-Commit-Position: refs/heads/master@{#488789}