MID-YEAR Maintenance release I

This is not the latest version, to get the latest version go here: https://github.com/mriscoc/Ender3V2S1/releases/latest

What's new in this release

• Advanced Settings menu reorganization
• Custom G-code C10 to mark a G-code file as a configuration file to avoid confirm to print and print done dialogs.
• Custom G-code C851 Mn ; Set Multiple Probing
• Fix bug: forbid multiple probing = 1
• Custom G-code C851 can be used to change the manual Z-offset for versions without probe
• De-bounce rotary encoder when a parameter is edited
• Allows to set the Z height after Z home for Manual Mesh version.
• Re-enabled ADAPTIVE_STEP_SMOOTHING
• Media Update (auto-mount) Enable/Disable menu item
• Support up to 6 Preheat settings (needs own compile)
• Support for Model predictive temperature control "MPC" (needs own compile)
• Refactoring Print File menu for performance and stability
• Enhanced Active mesh leveling indicator
• Fix drawing bug in select file menu: https://github.com/mriscoc/Ender3V2S1/issues/241
• Fix: Z at right edge out of mesh border is being overcompensated if UBL is active

From Last Marlin bugfix 2.1.x

• Optimize Planner calculations
• Arc/Planner optimization follow-up
• Update MPCTEMP G-Code M306 T
• Fix, improve Linear Advance with stand-alone stepper driver support