feat:Active Table filter count #1689

[Ultare1717]

closes h2oai#1689

This is the solution that we have defined and a video demonstrating that the filters work:

wave.filter.count.in.examples.table.mov

The PR fulfills these requirements: (check all the apply)

• It's submitted to the main branch.
• When resolving a specific issue, it's referenced in the PR's title (e.g. feat: Add a button #xxx, where "xxx" is the issue number).
• When resolving a specific issue, the PR description includes Closes #xxx, where "xxx" is the issue number.
• If changes were made to ui folder, unit tests (make test) still pass.
• New/updated tests are included