Using environment variables inside environment variables functions does not work

### Expected Behavior

I would like to set a SHA256 in the environment variables that has another environment variable as its input.

### Actual Behavior

Clicking "Done" resets the input field.

### Reproduction Steps

1. Create a new environment
2. Create an env:
```json
{
"foo": "bar"
"foo_joined": "{{ _.foo }}_baz",
"foo_hash": "{% hash 'sha256', 'hex', _.foo_joined %}"
}
```
3. Click "Done"
4. `foo_joined` removed

### Is there an existing issue for this?

- [X] I have searched the [issue tracker](https://www.github.com/Kong/insomnia/issues) for this problem.

### Additional Information

_No response_

### Insomnia Version

2022.7.0

### What operating system are you using?

macOS

### Operating System Version

latest

### Installation method

Homebrew

### Last Known Working Insomnia version

none

No file or test is named in the issue. Reproduce the problem by creating the environment with foo, foo_joined, and foo_hash, then trace the environment-variable editor and template evaluation when clicking “Done”; done means foo_joined is retained and the SHA256 value resolves correctly.

Written by the indexing model from the issue text.