glcanon: allow cone size to follow INI "CONE_BASESIZE" setting before G-code is loaded

Previously this was hard-coded to "1", and therefore ignored the prescribed base size.

Author: snowgoer540

lib/python/rs274/glcanon.py

@@ -1502,7 +1502,7 @@ def redraw(self):
                                        g.max_extents[Z] - g.min_extents[Z],
                                        2 ) * self.cone_basesize
                     else:
-                        cone_scale = 1
+                        cone_scale = self.cone_basesize
                     if self.is_lathe():
                         glRotatef(90, 0, 1, 0)
                         # if Rotation = 180 - back tool