- refactored the imports in the Plugins, moved almost all imports in the AppTool file

- fixed a number of issues, mostly leftovers from moving the UI of a Plugin in its own class
- fixed some bugs in the Punch Gerber plugin
- fixed some bugs where the 'pool' parameter was not passed when creating shapes collections (in 3D graphic mode); I wonder how it worked until now
- added a new feature in the Isolation Plugin: now for all the isolation Geometry objects this plugin can do a supplementary simplification of the geometry using the tolerance parameter defined in the General Parameters. This should lead to a reduced number of tool lifts when doing corners

appPlugins/ToolDistance.py

@@ -7,18 +7,9 @@
 
 from appTool import *
 from appGUI.VisPyVisuals import *
-from appGUI.GUIElements import FCEntry, FCButton, FCCheckBox, FCLabel, VerticalScrollArea, FCGridLayout, FCFrame
-
-import appTranslation as fcTranslate
 from camlib import AppRTreeStorage
 from appEditors.AppGeoEditor import DrawToolShape
 
-from copy import copy
-import math
-import logging
-import gettext
-import builtins
-
 fcTranslate.apply_language('strings')
 if '_' not in builtins.__dict__:
     _ = gettext.gettext
@@ -83,7 +74,7 @@ class Distance(AppTool):
 
         # VisPy visuals
         if self.app.use_3d_engine:
-            self.sel_shapes = ShapeCollection(parent=self.app.plotcanvas.view.scene, layers=1)
+            self.sel_shapes = ShapeCollection(parent=self.app.plotcanvas.view.scene, layers=1, pool=self.app.pool)
         else:
             from appGUI.PlotCanvasLegacy import ShapeCollectionLegacy
             self.sel_shapes = ShapeCollectionLegacy(obj=self, app=self.app, name='measurement')