FIX: make setpoint work for original positioner widget, adjust sizing #146

Job	Run time
standard / pre-commit checks / pre-commit	30s
standard / Documentation / Python 3.9: documentation building	1m 41s
standard / Conda (3.9, true) / Python 3.9: conda	13m 38s
standard / Conda (3.11, true) / Python 3.11: conda	11m 12s
standard / Pip (3.10) / Python 3.10: pip	7m 54s
standard / Pip (3.11, true) / Python 3.11: pip	4m 45s
standard / Conda (3.10) / Python 3.10: conda	15m 30s
standard / Pip (3.9, true) / Python 3.9: pip	7m 9s
standard / Documentation / Documentation deployment	0s
	1h 2m 19s

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