Describe the bug
When choosing time-dependent fees in price configuration, the days dropdown always goes from 1 to 31, independently of the month chosen.

To Reproduce
Steps to reproduce the behavior:

1. Go to Settings
2. Click on Configure Price
3. Scroll down to any modifier
4. Click on the dropdown for days
5. The array goes from 1 to 31

Expected behavior
I expect that the available days to choose depends on the month selected. I don't know what would happen if I selected e.g. Feb 31.

Screenshots

Hardware information:

• Country: Denmark
• Meter: Kamstrup
• Encryption enabled [yes/no]
• AMS reader: Pow-K+
• M-bus adapter (if applicable):

Relevant firmware information:

• Version: v2.5.6
• MQTT: yes
• MQTT payload type: home-assistant