Add Buttons in Probe Basic

[code]Debug file information:
....
/home/cnc/linuxcnc/configs/Fräse_Probe/probe_basic_postgui.hal:28: Pin 'qtpyvcp.licht.out' does not exist
Failed to load POSTGUI_HALFILE with error: 1
....


[code] 

.HalButton {
background: qlineargradient(spread:pad, x1:0, y1:0, x2:0, y2:1, stop:0 rgba(226, 64, 64, 255), stop:0.446154 rgba(204, 0, 0, 255), stop:0.764103 rgba(225, 67, 67, 255), stop:1 rgba(249, 142, 142, 255));
}
.HalButton:checked {
background: qlineargradient(spread:pad, x1:0, y1:0, x2:0, y2:1, stop:0 rgba(154, 231, 153, 255), stop:0.0974359 rgba(92, 243, 81, 255), stop:0.446154 rgba(52, 251, 35, 255), stop:1 rgba(154, 231, 153, 255));
}

loadrt time
loadrt not

addf time.0 servo-thread
addf not.0 servo-thread

# *** Time items required for Probe Basic to run ***
net prog-running not.0.in <= halui.program.is-idle
net prog-paused halui.program.is-paused => time.0.pause
net cycle-timer time.0.start <= not.0.out
net cycle-seconds qtpyvcp.timerseconds.in <= time.0.seconds
net cycle-minutes qtpyvcp.timerminutes.in <= time.0.minutes
net cycle-hours qtpyvcp.timerhours.in <= time.0.hours

#  ---manual tool change signals---
net tool-change-request     =>  qtpyvcp_manualtoolchange.change
net tool-change-confirmed   <=  qtpyvcp_manualtoolchange.changed
net tool-number             =>  qtpyvcp_manualtoolchange.number

# *** Probe graphic simulation trigger push probe tip ***
net probe-in  =>  qtpyvcp.probe-in.out
net probe-in  <=  qtpyvcp.probe-led.on

# *** Set line below for actual spindle readout from your hal file ***
net spindle-rpm-filtered scale_to_rpm.out  =>  qtpyvcp.spindle-encoder-rpm.in

# *** custom gui hal widget connections ***
net licht  <=  qtpyvcp.licht-button.checked
net licht  =>  hm2_7i76e.0.7i76.0.0.output-02