Added limits in the widgets for PIDs of AnalogOutpus and fixed
lag when the hide/show button is clicked multiple times
(added disconnect function).
Small change for the spacers in ADwin hardware widgets.

This reduces the event cycle time from 1400 to 1100 in the process.

This will make the changes easier, in case the repository is named differently.
Then one only needs to change the path in register_classes.py.

The default PID limits should not be (-10,10), but those specified in
the Output class, to ensure staying in safe limits.
Small fix, if PID channel is set with integer number.

Added adapted class for AnalogOutput with PID control.
This avoids having extra Widgets in the ADwin BLACS Tab,
the PID parameters can be set also in manual mode and the number
of AOut channels with PID is not fixed.

MISSING: Sending data to the right ADwin variables in the Worker and
adapting the ADwin process (to also set PID parameters).

Unirand pid

See merge request mpq-unirand/labscript/user_devices/leolab_devices!2

Manual mode pid

See merge request mpq-unirand/labscript/user_devices/leolab_devices!1