As suggested in
https://github.com/MarlinFirmware/Marlin/issues/5570#issuecomment-283059
065

Bidirectional Zig-Zag Nozzle Wipe

- Add configuration support for zigzags in either the X or Y axis, for
wipe pads significantly longer in one dimension.
- Add configuration for default number of zig-zag triangles, vs. a
magic number in `Marlin_main.cpp`.
- Update description of auto nozzle wiping to match functionality

Use PSTR for MSG_HEATING

Remove non-applicable comment on MANUAL_Z_HOME_POS

Add status_printf to print messages to the lcd status line.

Also add a hotend indicator to the heating message displayed on the lcd status line.

Finish reducing of ABL_BILINEAR_SUBDIVISION

Apply DISTINCT_E_FACTORS to sync_from_steppers

Followup to #5840

M600 cleanup and bugfix

Fix steps_to_mm for active extruders

Remove some old code comments

M600 wait for heatup, prevent stepper timeout, etc.

Fix broken homing in MBL

LCD call was waiting forever, causing the system to hang.

SD files alphabetical sort in LCD menus

Combine fixes for LIN_ADVANCE and temperature ISR

Reduce memory use by ABL_BILINEAR_SUBDIVISION slightly

If Marlin is inside the temperature ISR, the stepper ISR is enabled. If
a stepper event is now happening Marlin will proceed with the stepper
ISR. Now, at the end of the stepper ISR, the temperatre ISR gets enabled
again. While Marlin proceed the rest of the temperature ISR, it's now
vulnerable to a second ISR call.

Hopefully fixes Marlin #5481

Give encoder pulse/steps conditionals their own block

Make HOTEND_LOOP more consistent, let compiler optimize it

No space after X: or A: in M114 output