Allow manual numeric entry for Peak, FWHM, and Sparsity fields in CaTune #146

Problem / Motivation

In CaTune, it is currently not possible to directly enter a number in the text box for Peak, FWHM, and Sparsity.
It would be very helpful if users could type a value into the text box and press Enter, and have the corresponding slider update to that value as well.

Proposed Solution

Users should be able to:

• type a numeric value into the text box,
• press Enter,
• have the parameter update immediately,
• and have the slider move to the entered value.

Alternatives Considered

No response