- in TCL Shell removed the line that setFocus after the item is disabled

(this is pointless)
- added separators between groups of menu items
- added icons for the Drawing -> Paint and for the Drawing - > Buffer
- added ability to add icons for the Tools
- added icons to the current tools (Dblsided Tool, Measurement Tool)
- added buttons in the toolbar for: Open Gerber, Open Excellon,
Open Gcode and Save Project As
- added button in Tools toolbar for Measurement tool
- added separators in the toolbar
- organized the toolbar buttons in multiple toolbars that can be disabled
with right click on the toolbar
- added names for the toolbars where they were not present

MeasurementTool.py

@@ -29,8 +29,8 @@ class Measurement(FlatCAMTool):
         self.click_subscription = None
         self.move_subscription = None
 
-    def install(self):
-        FlatCAMTool.install(self)
+    def install(self, icon=None):
+        FlatCAMTool.install(self, icon)
         self.app.ui.right_layout.addWidget(self)
         self.app.plotcanvas.mpl_connect('key_press_event', self.on_key_press)