Non-dismissable dialogs and program crash when Rx Cin value set out of range.

[capn-freako]

Describe the bug
When I set the Rx Cin value to zero, which is below its allowed minimum value: 0.001, I get a couple error dialogs, which I can't dismiss by clicking on their "OK" buttons, and then the PyBERT program crashes.

To Reproduce
Steps to reproduce the behavior:

1. Launch PyBERT normally.
2. Set the value of Rx Cin to zero and hit <RET>.

Expected behavior
The value entry field for Rx Cin should turn red and the minimum value enforced when I attempt to enter zero.

Screenshots
If applicable, add screenshots to help explain your problem.

Desktop (please complete the following information):

• OS: MacOS 10.14.6
• Python Version 3.8.12
• PyBERT Version 3.5.0.0 (not pushed yet)

Additional context

1. Here is my relevant terminal output:

   (pybert-dev)
   dbanas@CapnFreakosMacBookPro:~
   $ python -m pybert
   objc[69010]: Attempt to use unknown class 0x7ff199f2ea00.
   Abort trap: 6
   

2. Hitting <RET> succeeds in dismissing the error dialogs where clicking on their OK buttons fails.

3. The Tx Cout field exhibits this same behavior.

[capn-freako]

Okay, I was able to fix this, by:

1. Adding a high parameter to their Range() constructors, in pybert.py, and

2. Adding the following line to their Item() descriptors, in pybert_view.py:

   editor=TextEditor(auto_set=False, enter_set=True, evaluate=float),