[UX Improvement] Creating an MQTT device with incorrect min or max values should be indicated instead of the default error message

[LM1LC3N7]

Describe the bug
When creating a new MQTT device, if I indicate a minimum value but not a maximum value, a default and generic message is displayed.

To Reproduce
Steps to reproduce the behavior:

1. Go to MQTT integration
2. Create a new MQTT device
3. Add a new capability
4. Add a name, set a minimal value but not the max value and save
5. See error

Expected behavior
A clear error message with the input highlighted in red for example, saying the max value is not set and is mandatory.

Screenshots

[Pierre-Gilles]

Fixed with a simple update:

🔗 #2244

In the medium term, the plan is to enhance this view with the improvements discussed here:

🔗 https://community.gladysassistant.com/t/catalogue-des-features-supportees-en-mqtt/8452/17?u=pierre-gilles