Design Proposal: component search changes

The current component search hides components that do not match (it also displays children if there are any) See first video below. Sometimes this is fine but I find contextual information to be useful: who the parent is, etc.)

I'm proposing we implement behavior that is more similar to searching in other panes of the devtools — like Elements — and searching in the web page.

Current behavior: https://www.dropbox.com/s/9yyb2qnqskahn0p/component-search-old.m4v?dl=0

Proposed behavior: https://www.dropbox.com/s/axhuzuf7sv66pog/component-search.m4v?dl=0

### Examples outside of Inspector

#### Searching in web page:

#### Searching in Elements panel:

No files, tests, or entry points are named. Compare the current and proposed behavior in the linked videos and images, then identify the component-search implementation and its existing tests; done means matching the proposed contextual search behavior while preserving relevant parent and child information.

Written by the indexing model from the issue text.