Correct abbreviation for minutes in settings

[DigiH]

Correct abbreviation for minutes in settings

I know this is a fine detail, and I'm sure no user would think the Update Interval setting shows a certain amount of metres, but being an application which in the widgets shows mainly scientific data for sensors I think it would be good form to also have the correct units displaying in other parts of the app.

Before

After

Fine on macOS even with the maximum interval setting of 360 min, but needs checking on all other platforms, if it might not require a wider selection box, or possibly even just the number in it and a changed text label like "Update interval in min/minutes"

https://github.com/theengs/app/actions/runs/2556733375

Checklist:

• The pull request is done against the latest development branch
• Only one feature/fix was added per PR and the code change compiles without warnings
• I accept the DCO.

[1technophile]

Thanks

[1technophile]

@emericg do we need to check this kind of modifications on all platforms or will the component resize adequately?