docs(examples): direct links, maximize, better props

[levithomason]

Direct links to every example

You can now link to every example file, regardless of whether or not it has a title. Clicking the link icon gives the example the "focused" style shadow, scrolls it into view, and copies the link to your clipboard.

Maximize an example

You can now launch any example in a maximized window. This is super helpful for large examples, like Grids:

Edit Code

Toggling the code editor now scrolls the example into view and updates the url with the direct link:

@see Portal Components

I've added links to portal powered components.

Cleaner Callback Docs

I recently added return types to callback signatures. We also now support object property param definitions (needed in Tab PR #430). I've now cleaned up the callback signature layout as well:

[codecov-io]

Codecov Report

Merging #1448 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #1448   +/-   ##
=======================================
  Coverage   99.74%   99.74%           
=======================================
  Files         141      141           
  Lines        2364     2364           
=======================================
  Hits         2358     2358           
  Misses          6        6

Impacted Files	Coverage Δ
src/collections/Menu/Menu.js	100% <ø> (ø)	✅
src/addons/Portal/Portal.js	100% <ø> (ø)	✅

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