Replace Angular $location service.

[trepagnier]

This PR:

• Replaces the Angular $location svc with our own more lightweight alternative.
• Cleans up various linting errors.

Note the @todo in the navigationSvc:

// locationSvc is being hitched to navigationSvc temporarily in order
// for Karma tests to have acces.
// @TODO: remove locationSvc after karma tests have been configured to
// import ES6 modules.

R e s #347

[shawnkendrick]

slick

[cuttlefish]

CodeFactor found an issue: 'location' is assigned a value but never used.

It's currently on:
app\ui\spec\navigationSvc.spec.js:5
Commit 788b88f

[cuttlefish]

Maybe just delete that uneeded location? Otherwise looks good