Missing validation error message for numeric inputs

[lordrip]

Describe the Bug

When validating numeric fields, there's no error message in the configuration form.

Steps to Reproduce the Bug or Issue

1

Screenshots or Videos

Platform

• OS: [e.g. macOS, Windows, Linux]
• Browser: [e.g. Chrome, Safari, Firefox]
• Version: [e.g. 0.30.0]

[lordrip]

Thanks @d4n1b for catching this

[d4n1b]

No worries! I created another PR to add a small test coverage