UI: overcommit ratio is not editable using the text box

[Nobuto Murata]

maas: 1:3.3.1-13169-g.94920eb1e-0ubuntu1~22.04.1

In LXD VM host configuration, we can change the overcommit ratio for CPU and Memory resources. However, it cannot be edited using text boxes next to the sliders. It's not good from an UX point of view, and also we cannot set a value something like +25% as 1.25 or -25% as 0.75 either.

[Thorsten Merten (thorsten-merten)]

We should ask UX to have a look at the poposed solution

[Peter Makowski (petermakowski)]

We'll need to review the current design with UX and propose an optimal solution that allows both slider and direct text input.

My suggestion would be to do the following:
Modify the UI component for the overcommit ratio to allow direct text input along with the slider.
- Restrict input to valid numeric values
- Define behaviour when invalid number is entered (reset and/or display an error)
- Ensure the text input and slider remain in sync bi-directionally.