- Gerber Editor: reduced the delay to show UI when editing an empty Gerber object

- update the order of event handlers connection in Editors to first connect new handlers then disconnect old handlers. It seems that if nothing is connected some VispY functions like canvas panning no longer works if there is at least once nothing connected to the 'mouse_move' event
- Excellon Editor: update so always there is a tool selected even after the Execllon object was just edited; before it always required a click inside of the tool table, not you do it only if needed.
- fixed the menu File -> Edit -> Edit/Close Editor entry to reflect the status of the app (Editor active or not)

FlatCAMApp.py

@@ -2093,12 +2093,9 @@ class App(QtCore.QObject):
 
         if isinstance(edited_object, FlatCAMGerber) or isinstance(edited_object, FlatCAMGeometry) or \
                 isinstance(edited_object, FlatCAMExcellon):
-
-            # adjust the status of the menu entries related to the editor
-            self.ui.menueditedit.setDisabled(True)
-            self.ui.menueditok.setDisabled(False)
+            pass
         else:
-            self.inform.emit(_("[WARNING_NOTCL] Select a Geometry or Excellon Object to edit."))
+            self.inform.emit(_("[WARNING_NOTCL] Select a Geometry, Gerber or Excellon Object to edit."))
             return
 
         if isinstance(edited_object, FlatCAMGeometry):
@@ -2109,7 +2106,8 @@ class App(QtCore.QObject):
                 edited_tools = [int(x.text()) for x in edited_object.ui.geo_tools_table.selectedItems()]
                 if len(edited_tools) > 1:
                     self.inform.emit(_("[WARNING_NOTCL] Simultanoeus editing of tools geometry in a MultiGeo Geometry "
-                                       "is not possible.\n Edit only one geometry at a time."))
+                                       "is not possible.\n"
+                                       "Edit only one geometry at a time."))
                 self.geo_editor.edit_fcgeometry(edited_object, multigeo_tool=edited_tools[0])
             else:
                 self.geo_editor.edit_fcgeometry(edited_object)
@@ -2156,16 +2154,8 @@ class App(QtCore.QObject):
         """
         self.report_usage("editor2object()")
 
-        # adjust the status of the menu entries related to the editor
-        self.ui.menueditedit.setDisabled(False)
-        self.ui.menueditok.setDisabled(True)
-
         # do not update a geometry or excellon object unless it comes out of an editor
         if self.call_source != 'app':
-            # adjust the visibility of some of the canvas context menu
-            self.ui.popmenu_edit.setVisible(True)
-            self.ui.popmenu_save.setVisible(False)
-
             edited_obj = self.collection.get_active()
             obj_type = ""
 
@@ -2244,6 +2234,8 @@ class App(QtCore.QObject):
                         self.grb_editor.deactivate_grb_editor()
                     elif isinstance(edited_obj, FlatCAMExcellon):
                         self.exc_editor.deactivate()
+                        # set focus on the project tab
+                        self.ui.notebook.setCurrentWidget(self.ui.project_tab)
                     else:
                         self.inform.emit(_("[WARNING_NOTCL] Select a Gerber, Geometry or Excellon Object to update."))
                         return