My Home: Add a video icon beside the Free Photo Library prompt.

[kwight]

Both the Mastering Gutenberg and Free Photo Library cards involve text links that open a modal to a video. The former has video icons before the links, the latter does not; this PR adds the same icon to the latter for consistency.

Before	After

Testing instructions

• Go to My Home either on this branch or via the calypso.live link (any site will do).
• Verify the video icon beside "Learn more" in the Free Photo Library card under Learn and Grow.

[matticbot]

Test live: https://calypso.live/?branch=add/home-photos-icon

[matticbot]

Here is how your PR affects size of JS and CSS bundles shipped to the user's browser:

Sections (~7 bytes added 📈 [gzipped])

name  parsed_size           gzip_size
home        +13 B  (+0.0%)       +7 B  (+0.0%)

Sections contain code specific for a given set of routes. Is downloaded and parsed only when a particular route is navigated to.

Legend

What is parsed and gzip size?

Parsed Size: Uncompressed size of the JS and CSS files. This much code needs to be parsed and stored in memory.
Gzip Size: Compressed size of the JS and CSS files. This much data needs to be downloaded over network.

Generated by performance advisor bot at iscalypsofastyet.com.

[gwwar]

Makes sense and tests well for me @kwight, good catch.