Extend range of values for display brightness setting

[ia]

Describe the bug
Range of values for display brightness setting may be too short for some situations.

To Reproduce
Open OLED brightness in settings: it has values from 0/1 to 5 (from 0/1 to 100 with step 25 under the hood).

Expected behavior
Display brightness may have more wide range of values, i.e., from 1 to 10 (from 0/1 to 100 with step 10).

Details of your device:
Applicable to any supported device.

Additional context
I would like to fill this bug report to track further possible work & to track the feedback from other users. Considering how much IronOS users like to tweak their irons and customize every possible setting and button, I'm very surprised that no one didn't ask for this before. I've made a couple of test builds already, hacking around MIN / MAX / STEP brightness in configuration.h, and considering that users may have to work in different light conditions, I start to think that brightness should have a bit more wider range of values. It seems that from 1 to 10 with 10 step looks pretty reasonable, but at the same time it gives pretty distinguishable light for every step.

@Ralim & @discip, what do you think? Would you agree to accept this as new global defaults?

[discip]

@ia
This is funny — some time ago, there was a request to reduce the increments from 10 to 5 (see #1622). 🤣
So that's what I ended up with, and every one seemed to be happy.

Another helpful reference in this regard: #1087

[ia]

@discip, sorry for the false alarm. Very interesting discussions indeed. Well, I guess I just will be carry custom defines around my build myself then, because I really like extended range more. :)

[discip]

Don't get me wrong—this isn't set in stone! 😊
If people need finer increments, then that's the way to go.
I personally use all my devices on the lowest setting anyway.
Maybe @Ralim has a definitive opinion on this?

[Ralim]

Err I dont have strong feelings.
@ia I'm curious why you use the extra steps, how often are you adjusting this? 🤣