Fix: Add props passing into icons

[enejb]

Currently the icons don't allow for props to be passed to the main SVG component.

The problem is that this prevents the mobile Gutenberg editor from passing in the correct fill prop for the icon.

On the mobile inserted.
Before:

After:

To tests

I build a new version of the layout-grid plugin.
using yarn plugin layout-grid
and then yarn bundle

And then I installed the plugin on my site.
And tried to find if the icons have changed anywhere with undesirable outcomes.

See:

To test it on mobile I followed the instructions in wordpress-mobile/gutenberg-mobile#2582
and then patched the icon file. Which fixed how the icons appeared.

[mkaz]

This looks fine, one question on the two GridIcon components you include a props = null but on the rest you just add a props parameter without the default null.

In my initial testing it looks like it doesn't make a difference, I would probably prefer without the default but either way should be consistent across all.

[mkaz]

Thanks for updating, looks good 👍

[enejb]

Thanks for the review and testing @mkaz !