BUG: Allow jog on limit when limit override is true

Problem:
- The _jog_axis_ok method disallows jogging if the joint has hit a limit even
  if override limits is active.

Solution:
- If the axis has hit a limit, check if override_limits has been enabled for
  the corresponding joint. If so, jogging is ok.

qtpyvcp/actions/machine_actions.py

@@ -1070,9 +1070,10 @@ def _jog_speed_slider_bindOk(widget):
 
 def _jog_axis_ok(axis, direction=0, widget=None):
     axisnum = getAxisNumber(axis)
+    jnum = INFO.COORDINATES.index(axis)
     if STAT.task_state == linuxcnc.STATE_ON \
             and STAT.interp_state == linuxcnc.INTERP_IDLE \
-            and STAT.limit[axisnum] == 0:
+            and (STAT.limit[axisnum] == 0 or STAT.joint[jnum]['override_limits']):
         # and STAT.homed[axisnum] == 1 \
         ok = True
         msg = ""