- fixed bug in FlatCAMObj.FlatCAMGeometry.ui_disconnect(); the widgets signals were not disconnected from handlers when required therefore the signals were connected in an exponential way

- some changes in the widgets used in the Selected tab for Geometry object
- some PEP8 cleanup in FlatCAMObj.py

flatcamTools/ToolPDF.py

@@ -360,13 +360,13 @@ class ToolPDF(FlatCAMTool):
 
         try:
             self.check_thread.stop()
-        except Exception as e:
+        except TypeError:
             pass
 
         self.check_thread.setInterval(check_period)
         try:
             self.check_thread.timeout.disconnect(self.periodic_check_handler)
-        except:
+        except TypeError:
             pass
 
         self.check_thread.timeout.connect(self.periodic_check_handler)