[People Picker] Allow to set resultsMaximumNumber

[tsekityam]

Too many suggestions may freeze the UI. Limiting the number of suggestions show to user reduces the chances of freezing.

Q	A
Bug fix?	[x]
New feature?	[ ]
New sample?	[ ]
Related issues?	mentioned in #143

What's in this Pull Request?

People picker may be freezing if there are too many matchings, such as searching for users that match a in a tenet with thousands of users.

This patch introduces a new property resultsMaximumNumber to limit the max number of suggestions show to user.

[codecov-io]

Codecov Report

Merging #148 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #148   +/-   ##
=======================================
  Coverage   80.63%   80.63%           
=======================================
  Files          10       10           
  Lines         346      346           
  Branches       78       71    -7     
=======================================
  Hits          279      279           
  Misses         44       44           
  Partials       23       23

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update b54fda7...faf2e90. Read the comment docs.

[estruyf]

Thanks @tsekityam this got merged to the DEV branch.