[SalesForce] Difference between app home page and custom home page – Lightning

SVG support along with document.createElementNS() is coming very soon - already in a scheduled patch branch. I'll double check on the release date but I believe it deploys tommorow night. We've filled in many other gaps in the secure virtual DOM API with more on the way in following patches. Please pardon our dust as we get this dialed in over the next few weeks and definitely keep letting us know when you hit missing methods/properties.

There is no way to do that!

They are totally different technologies - although they have the name components, they are different and only a manual creation of a lightning component to be like the classic home page component would give you what you want