disable modal for images with data-modal="false" in docs pages

[vishalvivekm]

Notes for Reviewers

This PR fixes

• currently, all imgs are opened in modal on pages using docs layout causing the nav grid icon to malfunction, the pr prevents this behaviour for imgs that have data-modal attribute set as false ( we an just set the attribute for such other opt-out icons as well)

Signed commits

• Yes, I signed my commits.

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[vishalvivekm]

@leecalcote
This was a bug in the site due to which, from any docs page when clicked all the <img /> elements would open in modal including the footer icons. e.g.

I fixed this here.

[leecalcote]

Ooooh, I see. Ok, yeah.

[leecalcote]

Thanks for getting this fixed!