- a series of PEP8 corrections in the FlatCAMGeometry.py

- in Geometry UI finished a very basic way for the Polish feature (this will be upgraded in the future, for now is very rough)
- added some new GUI elements by subclassing some widgets for the dialog pop-ups
- in NCC Tool and Isolation Tool, pressing the shortcut key 'T' will bring the add new tool pop up in which now it is included the button to get the optimal diameter
- in Geometry UI and for Solderpaste Tool replaced the pop up window that is launched when using shortcut key with one that has the context menu translated
- some UI cleanup in the Geometry UI

app_Main.py

@@ -4419,9 +4419,9 @@ class App(QtCore.QObject):
             if self.collection.get_active().kind == 'geometry':
                 # Tool add works for Geometry only if Advanced is True in Preferences
                 if self.defaults["global_app_level"] == 'a':
-                    tool_add_popup = FCInputDialog(title="New Tool ...",
-                                                   text='Enter a Tool Diameter:',
-                                                   min=0.0000, max=99.9999, decimals=4)
+                    tool_add_popup = FCInputSpinner(title='%s...' % _("New Tool"),
+                                                    text='%s:' % _('Enter a Tool Diameter'),
+                                                    min=0.0000, max=100.0000, decimals=self.decimals, step=0.1)
                     tool_add_popup.setWindowIcon(QtGui.QIcon(self.resource_location + '/letter_t_32.png'))
 
                     val, ok = tool_add_popup.get_value()
@@ -4448,7 +4448,10 @@ class App(QtCore.QObject):
 
         # work only if the notebook tab on focus is the Tools_Tab
         if notebook_widget_name == 'tool_tab':
-            tool_widget = self.ui.tool_scroll_area.widget().objectName()
+            try:
+                tool_widget = self.ui.tool_scroll_area.widget().objectName()
+            except AttributeError:
+                return
 
             # and only if the tool is NCC Tool
             if tool_widget == self.ncclear_tool.toolName:
@@ -4462,6 +4465,10 @@ class App(QtCore.QObject):
             elif tool_widget == self.paste_tool.toolName:
                 self.paste_tool.on_add_tool_by_key()
 
+            # and only if the tool is Isolation Tool
+            elif tool_widget == self.isolation_tool.toolName:
+                self.isolation_tool.on_add_tool_by_key()
+
     # It's meant to delete tools in tool tables via a 'Delete' shortcut key but only if certain conditions are met
     # See description below.
     def on_delete_keypress(self):
@@ -4469,7 +4476,7 @@ class App(QtCore.QObject):
 
         # work only if the notebook tab on focus is the properties_tab and only if the object is Geometry
         if notebook_widget_name == 'properties_tab':
-            if str(type(self.collection.get_active())) == "<class 'FlatCAMObj.GeometryObject'>":
+            if self.collection.get_active().kind == 'geometry':
                 self.collection.get_active().on_tool_delete()
 
         # work only if the notebook tab on focus is the Tools_Tab