Add support for iframe page

[LordBoos]

I'd really like to have a possibility to add iframe page to the HACC to be able to display Grocy.

Right now I'm using TileBoard and it's iframe tile to display Grocy on a separate page. I'm using it on my fridge to keep track of items and shopping lists.

[nickrout]

upvote.

[arfrater]

upvote for me as well please

[qJake]

As long as the address is accessible from the tablet, and there are no iframe restrictions from the other apps (e.g. CSP frame-ancestors) then I think this should be fairly easy to add!