- fixed bug in Gerber Editor in which the units conversion wasn't calculated correct

- fixed bug in Gerber Editor in which the QThread that is started on object edit was not stopped at clean up stage
- fixed bug in Gerber Editor that kept all the apertures (including the geometry) of a previously edited object that was not saved after edit

flatcamGUI/preferences/general/GeneralAppPrefGroupUI.py

@@ -374,10 +374,25 @@ class GeneralAppPrefGroupUI(OptionsGroupUI):
         self.splash_cb.stateChanged.connect(self.on_splash_changed)
 
         # Monitor the checkbox from the Application Defaults Tab and show the TCL shell or not depending on it's value
-        self.shell_startup_cb.clicked.connect(self.app.on_toggle_shell_from_settings)
+        self.shell_startup_cb.clicked.connect(self.on_toggle_shell_from_settings)
 
         self.language_apply_btn.clicked.connect(lambda: fcTranslate.on_language_apply_click(app=self.app, restart=True))
 
+    def on_toggle_shell_from_settings(self, state):
+        """
+        Toggle shell: if is visible close it, if it is closed then open it
+        :return: None
+        """
+
+        self.app.defaults.report_usage("on_toggle_shell_from_settings()")
+
+        if state is True:
+            if not self.app.ui.shell_dock.isVisible():
+                self.app.ui.shell_dock.show()
+        else:
+            if self.app.ui.shell_dock.isVisible():
+                self.app.ui.shell_dock.hide()
+
     @staticmethod
     def on_splash_changed(state):
         qsettings = QSettings("Open Source", "FlatCAM")

flatcamGUI/preferences/general/GeneralGUIPrefGroupUI.py

@@ -779,7 +779,7 @@ class GeneralGUIPrefGroupUI(OptionsGroupUI):
         self.app.connect_toolbar_signals()
 
         self.app.ui.grid_snap_btn.setChecked(True)
-        self.app.on_grid_snap_triggered(state=True)
+        self.app.ui.on_grid_snap_triggered(state=True)
 
         self.app.ui.grid_gap_x_entry.setText(str(self.app.defaults["global_gridx"]))
         self.app.ui.grid_gap_y_entry.setText(str(self.app.defaults["global_gridy"]))