Add OLED font uninstall, change constraint on EEPROM blocks

[MatzElectronics]

OLED fonts take up 22k of upper EEPROM, leaving users with only 7k of open space. By adding a function and and warning, we could give users the option of fonts OR more EEPROM for data logging applications.

Would require a small c function (not a library) to check for fonts and constrain accordingly, and detection in EEPROM blocks to look for OLED blocks and throw range warnings if above 7.6k