Add the possibility of setting the value range manually in the Signal Strength widget configuration

[jktu2870]

Before

How to demo somethings that hadn't existed before?

After

Pull Request description

The Signal Strength widget has some limitations.
Currently, a value of -100 is the final acceptable value to display on the widget. A value of -100 is hardcoded and is not displayed on the chart.

The customer has a scenario where the value displayed on the widget may be outside of this range (e.g., -130).

Therefore, the customer would like to be able to manually set the values for each range in the way that there is a possibility to configure the color of active/inactive signal bars under the 'Signal strength card style' section:

General checklist

• You have reviewed the guidelines document.
• Labels that classify your pull request have been added.
• The milestone is specified and corresponds to fix version.
• Description references specific issue.
• Description contains human-readable scope of changes.
• Description contains brief notes about what needs to be added to the documentation.
• No merge conflicts, commented blocks of code, code formatting issues.
• Changes are backward compatible or upgrade script is provided.
• Similar PR is opened for PE version to simplify merge. Crosslinks between PRs added. Required for internal contributors only.

Front-End feature checklist

• Screenshots with affected component(s) are added. The best option is to provide 2 screens: before and after changes;
• If you change the widget or other API, ensure it is backward-compatible or upgrade script is present.
• Ensure new API is documented here

[jktu2870]

Previous PR with comments #10200