Only enable eeprom after connected.
Made the thumbnail thread a background task rather than a thread so that it will free the memory used when creating the thumbnail when done.
Merge remote-tracking branch 'origin/development-kp' into development

Conflicts:
	PrinterControls/ManualPrinterControls.cs
Don't know how I left this (edited during debug?).
Removed all the internal performance monitoring in favor of an external tool.