Improvements to MBL, general LCD menu handling

Split DEFAULT_MACHINE_NAME from DEFAULT_SOURCE_URL

Addressing #3325 – Avoid undefined symbol errors in the compiler.

Babystepping Fix

changed DEFAULT_NOMINAL_FILAMENT_DIA for consistency between example config files

Max endstops disabled for stock Prusa i3 Hephestos.

Fix manual Y movement on delta (regression).

Fixes missing icons from status screen

Follow-up the commit a393941

Wrong board def in pins.h

Release 1.1.0-RC5

Various patches for LCD menu issues

Fix comment about host keepalive interval

Thanks to @jbrazio #3301

Clean up num2str functions, extend ftostr43

Support for MKS v1.3/1.4 and Sainsmart RAMPS 1.4 variants

Macros for buttons, some cleanup for slow buttons

This is the easiest way to make button pin testing consistent without
renaming all the button pins. Just make a macro especially for testing
if button pins are set, since they are named consistently in the pins
files.