fix(chips): unwanted re-focus of last chip after blur

[Splaktar]

PR Checklist

Please check that your PR fulfills the following requirements:

• The commit message follows our guidelines
• Tests for the changes have been added or this is not a bug fix / enhancement
• Docs have been added, updated, or were not required

PR Type

What kind of change does this PR introduce?

[x] Bugfix
[ ] Enhancement
[ ] Documentation content changes
[ ] Code style update (formatting, local variables)
[ ] Refactoring (no functional changes, no api changes)
[ ] Build related changes
[ ] CI related changes
[ ] Infrastructure changes
[ ] Other... Please describe:

What is the current behavior?

As described by @caseyjhol, "With md-add-on-blur enabled, clicking outside mdChips or selecting another input element results in the previously focused mdChips being highlighted again. This is especially jarring on a mobile device (e.g. type in some text for the chip, scroll down to the next form element, select it, and then the chip is added but mdChips is then scrolled back into position and focused). It's also not possible to tab to the next element."

Issue Number:
Fixes #10758

What is the new behavior?

this solves a regression introduced in 1.1.2 by #9650
change ng-change demo to use $log instead of alert
fix some lint line length warnings
JSDoc clean up

Does this PR introduce a breaking change?

[ ] Yes
[x] No

Other information