The Issue Summary Table code was pretty old and a lot of the logic was

spread out unnecessarily. This change simplifies it a bit, converting

the view to ES6, documenting the functions, and simplifying the flow of

some of the code. Some small internal functions only called by one other

function have had their code moved into that function, making it easier

to read through and see exactly what the function is doing.
There was a logic change that impacts the code a bit more than just

in-view cleanup. Previously, the Issue Summary Table would take care of

navigating to the correct spot on the page when clicking an issue,

alongside triggering the issueClicked event. Now, it simply emits the

event (in a more structured form), leaving it up to the page to handle

the navigation to the correct anchor. This makes it easier to unit test

and keeps the Issue Summary Table from taking on more than it needs to.
Unit tests were also added for the view to help ensure it continues to

behave as expected. This caught a bug in the one of the conditions for

showing the "No Issues" text.

Unit tests pass.
Tested all forms of filtering (status types, reviewers) and column

sorting.
Tested that clicking an issue still navigated to the correct spot and

caused the entry to be expanded when collapsed.
Tested that issue state updates are still tracked, and that the entries

and counts are properly updated (taking into account the current filters).
Tested that the table still updates properly when resizing the page.