Make Infinite Canvas top&left infinite

[minesworld]

Describe the problem

The user can not scroll the canvas to the left or top as there seems to be a "point zero" limit.

Describe the solution

• as "infinite" is "not really" inifite - position the ink at the middle of the 2^21 pixels and remember the used offset
• maybe apply that offset to values given back to realtime control consumers so that they won't break
• apply that offset when giving back the whole canvas content as ink/json, maybe as on option so that controls that consumed the realtime notifications doesn't get confused...

Alternatives

No response

Additional info

Will fix that if the "pain" gets to big. Depends on if the InfiniteControl is usable at all - see #4583 ...

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