Mobile users can't access Customize in the Admin Bar

[postphotos]

Proposed fix 1: In WP Core, Change default "paintbrush" icon to initialize "Customize" just as pencil does - call /wp-admin/customize.php and allow mobile user to make changes to site using customizer as per usual.
Edit: proposed fix 1 is not necessary.

Proposed fix 2: For this plugin, revise the customize menu to match the styling of the "posts" dropdown (both screenshots included here) with a link to /wp-admin/customize.php to make it easier to access both features in the Admin Bar for mobile users.
Proposed fix for Customize menu: https://xwp.slack.com/files/U7FQCBYS1/F7V9W7M8X/customize.png
Current Posts menu: https://xwp.slack.com/files/U7FQCBYS1/F7U8W8560/dev-xwp-testbed.pantheonsite.io-_iphone_5_.png

[westonruter]

This needs to be improved, but it isn't a regression in the changes for 4.9 (#162), so it's not a high priority.