Add custom value to editable select field

[vitPinchuk]

Resolves: #162

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 92.85714% with 1 line in your changes missing coverage. Please review.

Project coverage is 99.77%. Comparing base (3f0bb76) to head (822c3b3).

Files with missing lines	Patch %	Lines
src/module.ts	0.00%	1 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #165 +/- ## ======================================= Coverage 99.76% 99.77% ======================================= Files 163 163 Lines 2608 2617 +9 Branches 591 579 -12 ======================================= + Hits 2602 2611 +9 Misses 6 6 ```

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