Enhancements to tiny OLEDs, OTA beautified

[trip5]

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A quick summary of what's in this (as included in the main.cpp):

OLED 64x128 improvements: blank screen with backlight time (both available in prefs), character limit for small displays. Also: OTA beautified, fixed rotary timeout display, new esp-idf ADC (the new number is 12 for attenuation instead of 11).

I added a bunch of functions to help with small displays but I think they only apply to the tiny OLEDS. But they can be applied to other displays should the need arise.

I made a big change to the OTA too. It looks pretty good on my Tiny OLED. It didn't display any update information before at all. It was kind of a PITA to get it working the way it's supposed to.