Remove reference to search icon in main-nav files

[yvonnetangsu]

READY FOR REVIEW

Summary

• We changed the icon in site-search button to background image. Now we need to remove the reference to the icon image in main-nav.twig and json.
• Added a little documentation for Noto Sans that it's the Sanskrit subset and should only be used when one needs Sanskrit support.

Needed By (Date)

• Before v5

Urgency

• ASAP

Steps to Test

1. Pull this branch and run grunt styleguide
2. Check that the .su-main-nav--mobile-search variant looks ok when in xs-md breakpoints.
3. Check that the reference to the search icon has been removed in main-nav.twig and json.
4. Check that the added documentation under Fonts - Noto Sans is ok

Affected Projects or Products

• Decanter

Associated Issues and/or People

• @JBCSU
• 90 basic webpack #334

[yvonnetangsu]

@JBCSU , let me know if I missed anything else with the site-search icon.

@josephgknox , let me know if the added documentation for Noto Sans makes sense. I kind of bundled that in with the site-search icon tweaks.

Thanks!!

[JBCSU]

Looks good. Thanks!

[josephgknox]

Yay -- already merged. Thanks, @yvonnetangsu!