Allow to reduce the override-time on override-page

[Thomas131]

This is my first PoC which enables a user to limit the override-time on the override-page.

Is that OK? Should I make any further changes? (Or feel free to make the changes yourself)

closes #272

[Thomas131]

Hi @proginosko
I would love your feedback :)

[proginosko]

Sorry for the delay in replying. LB is a hobby for me and unfortunately I have very little time to work on it right now. I will try to take a look at this over the Christmas break.

[Thomas131]

Hi @proginosko, any updates on this PR?

[proginosko]

Sorry for the delay. I just took a look at it. I guess I like the idea, but I'm not sold on the implementation. There were some UI issues at my end (scroll bar appears in dialogue box, slider changes size, shows negative numbers).

I wonder how much demand there is to adjust the override duration like this. I don't recall any users requesting it. But if it were implemented, I would prefer it to appear on the override page itself, rather than in a dialogue box. Also, some users have requested the option to specify a per-set override duration, so any option to adjust the duration would need to be coordinated with that. So I'm not ready to pull this into the project in its current form. Sorry to disappoint.