WellPlatePlan selected_wells field_validator

[fdrgsp]

@tlambert03 I think the reason for which when we do:

useq.WellPlatePlan(plate=6, a1_center_xy=(0,0), selected_wells=())

or

useq.WellPlatePlan(plate=6, a1_center_xy=(0,0), selected_wells=None)

we get all the well selected is because in the WellPlatePlan selected_wells field_validator we run plate.indices(value) which in absence of value returns the entire well indices.

Not sure what's the best way to fix that, if in the validator itself, in plate.indices or maybe in _expression_repr methods...

[tlambert03]

The intention was to select all wells by default, do you want to change it to select no wells by default?