feat(graphical): support rendering labels that contain newlines (#318) #761

Job	Run time
Check fmt & build docs	23s
Build & Test (1.56.0, ubuntu-latest)	4m 38s
Miri	3m 3s
Minimal versions check (ubuntu-latest)	24s
Minimal versions check (macOS-latest)	59s
Minimal versions check (windows-latest)	52s
Build & Test (1.56.0, macOS-latest)	6m 41s
Build & Test (1.56.0, windows-latest)	6m 1s
Build & Test (stable, ubuntu-latest)	39s
Build & Test (stable, macOS-latest)	1m 8s
Build & Test (stable, windows-latest)	1m 59s
	26m 47s

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