Fix Z-Wave JS UI script

[MickLesk]

Description

An update was probably possible before, but it was programmed really badly.
I quickly reworked the whole script again.

• Now it works with an .env file
• Not all user data is overwritten during the update
• Update adapted to our conventions

Fixes #207

Type of change

Please check the relevant option(s):

• Bug fix (non-breaking change that resolves an issue)
• New feature (non-breaking change that adds functionality)
• Breaking change (a fix or feature that would cause existing functionality to change unexpectedly)
• New script (a fully functional and thoroughly tested script or set of scripts.)

Prerequisites

The following efforts must be made for the PR to be considered. Please check when completed:

• Self-review performed (I have reviewed my code, ensuring it follows established patterns and conventions)
• Testing performed (I have tested my changes, ensuring everything works as expected)
• Documentation updated (I have updated any relevant documentation)

Additional Information (optional)

Tested by User, migrated in Script.

[schonzen]

I just finally found this breaking change that wasn't labeled as such after stumbling into the break while trying to troubleshoot a failing firmware upgrade. All I wanted was the new ZWave-JS, I didn't realize I was getting such a heavily reworked update script designed for an install script that didn't exist until this change. I'm new to this community, but really liked tteck's work.

Wouldn't it have made sense to need to write an update script that migrated to the new env method? Otherwise this is a purely breaking change for any install that existed before it.

I thought about writing an issue first but I wanted to find what happened where and found this.

[MickLesk]

1 second search in discussions:
#635

[havardthom]

I agree that this commit should be marked as breaking change, I will manually fix it in the changelog. Regarding update scripts handling breaking changes that applications choose to make, that is not in our scope and will make the scripts unmanageable over time.

[schonzen]

Oh, the break was from the script not the application.