Ability to search filter tests

[diversemix]

At the moment when opening the test explorer there are lots of tests and it can be extremely difficult to find a single one you wish to run. Add a feature that would allow filtering and searching would be a great way to find the test(s) you wish to run.

I would suggest this behaves like the Filter (funnel icon) and "Search Extensions" box in the Extensions bar.

[ppparihar]

@diversemix check #15 this may help you.

[diversemix]

I've left a comment on #15 - happy to close this one as a duplicate - if you want to use the other issue only.