Installed bed leveling probe, now Z homing moves to center

I had the same problem, solved it by inserting

// Move X and Y to 0 after homing
process_subcommands_now_P("G1 X0 Y0 F5000");

at the end of G28.cpp, just before ui.refresh();

This moves the print head to X0, Y0 and leaves Z untouched after the homing procedure. This way any oozing that might happen while the extruder heats up will be outside of the bed.

This is a consequence of enabling Z_SAFE_HOMING:

Z Safe Homing prevents Z from homing when the probe (or nozzle) is outside bed area by moving to a defined XY point (by default, the middle of the bed) before Z Homing when homing all axes with G28. As a side-effect, X and Y homing are required before Z homing. If stepper drivers time out, X and Y homing will be required again.

Enable this option if a probe (not an endstop) is being used for Z homing. Z Safe Homing isn’t needed if a Z endstop is used for homing, but it may also be enabled just to have XY always move to some custom position after homing.

My default Cura start G-code contained this sequence:

G28 X0 Y0 ;move X/Y to min endstops
G28 Z0 ;move Z to min endstops

I changed this to

G28 ;safe homing
G90 ;absolute positioning
G0 X0 Y0 ; move to bottom-left corner for nozzle wipe

However any oozing will still happen at the center of the build plate, which is a problem.