Move was not rejected when position might not have been known.

The xcuActor is supposed to reject moves if the home limit switches are not known to have been hit. On a recent move that was probably not checked correctly. Check and fix:

2023-07-17T07:12:01.890.log:2023-07-18 03:08:49.208Z cmds 20 Actor.py:524 new cmd: motors toFocus
2023-07-17T07:12:01.890.log:2023-07-18 03:08:54.176Z cmds 20 CommandLink.py:122 > 2 360 i ccdMotor1=OK,0,0,1841,150.01
2023-07-17T07:12:01.890.log:2023-07-18 03:08:54.323Z cmds 20 CommandLink.py:122 > 2 360 i ccdMotor2=OK,0,0,1825,149.96
2023-07-17T07:12:01.890.log:2023-07-18 03:08:54.417Z cmds 20 CommandLink.py:122 > 2 360 i ccdMotor3=OK,0,0,1825,149.96
2023-07-18T03:11:57.904.log:2023-07-18 03:13:28.887Z cmds 20 Actor.py:524 new cmd: motors toFocus
2023-07-18T03:11:57.904.log:2023-07-18 03:13:31.207Z cmds 20 CommandLink.py:122 > 2 13 w ccdMotor1=Unknown,0,0,2189,180.00
2023-07-18T03:11:57.904.log:2023-07-18 03:13:31.344Z cmds 20 CommandLink.py:122 > 2 13 w ccdMotor2=Unknown,0,0,2401,200.04
2023-07-18T03:11:57.904.log:2023-07-18 03:13:31.449Z cmds 20 CommandLink.py:122 > 2 13 w ccdMotor3=Unknown,0,0,1480,119.97
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