Clearing error messages - without a bunch of mouse clicks

Is there a hot key, or some way to clear error messages (preferably all of them at once)?

I find hunting a pecking to clear these error messages a PITA.

I don't mind using a dedicated input from a button on the Mesa card if that's what it takes.
 

Axis GUI should have hal pins to clear messages:

See section 13:
linuxcnc.org/docs/html/gui/axis.html#_keyboard_controls

I used the axisui.notifications-clear-error bit pin with oneshot. They must be loaded in a postgui file, with this option the error message appears on the screen for the time determined by oneshot and then it is deleted

In axis:    Ctrl + spacebar  clears all the messages. This can also be used for OK in a tkinter message box or confirm toolchange window.
 

loadrt oneshot names=oneshot.GUI-ERROR
addf oneshot.GUI-ERROR        servo-thread
setp oneshot.GUI-ERROR.width           2
setp oneshot.GUI-ERROR.retriggerable   0
net GUI-error            axisui.error                 oneshot.GUI-ERROR.in
net BORRAR-ERROR-GUI     oneshot.GUI-ERROR.out-not    axisui.notifications-clear-error

Work for me.