fix(setting-iframe): move iframe to bottom and set height to 2000px

[codewithvk]

Follow up to #4787

Checklist

• Code is properly formatted
• Sign-off message is added to all commits
• Documentation (manuals or wiki) has been updated or is not required

[pedropintosilva]

@codewithvk can you do a follow up on this, to pass over the height of the contents ?

and then we can possibly backport this?

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[juliusknorr]

Follow up is there in #4787