Don't show grid resize handles on top of scene labels

[ruggi]

Problem:

The grid resize handles are shown on top of the scene label.

Fix:

Move the handles north of the scene label if the grid is also a scene.

Fixes #6485

[github-actions]

Try me

[relativeci]

#14623 Bundle Size — 57.76MiB (~+0.01%).

74a7c44(current) vs 916e8b9 master#14617(baseline)

Warning

Bundle contains 70 duplicate packages – View duplicate packages

Bundle metrics   2 changes 1 regression

	Current #14623	Baseline #14617
Initial JS	40.76MiB(~+0.01%)	40.76MiB
Initial CSS	0B	0B
Cache Invalidation	17.96%	18.48%
Chunks	21	21
Assets	23	23
Modules	4112	4112
Duplicate Modules	213	213
Duplicate Code	27.4%	27.4%
Packages	475	475
Duplicate Packages	70	70

Bundle size by type   2 changes 1 regression 1 improvement

	Current #14623	Baseline #14617
JS	57.75MiB (~+0.01%)	57.75MiB
HTML	7.37KiB (-0.25%)	7.39KiB

Bundle analysis report Branch fix/grid-resizing-scene-label Project dashboard

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[ruggi]

moving it to draft while we decide on the approach here

[ruggi]

this has been superseded by parallel work, closing