Use shared jQuery references instead of repeately querying DOM#101

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tommcc wants to merge 2 commits intopattern-lab:developfrom

tommcc:use-jquery-references

Commits on Oct 30, 2017

Use shared references to .pl-js-iframe and .pl-js-vp-iframe-container instead of querying the DOM every time.
Tom McCaffery
committed
Use shared references to .pl-js-viewport-cover instead of querying the DOM every time.
Tom McCaffery
committed