Fix pythonpath update for relative file paths (#158)

* Fix pythonpath update for relative file paths

* Add script path at the beginning

* Add typing_extensions to CI reqs

cq_editor/widgets/debugger.py

@@ -178,9 +178,9 @@ def compile_code(self,cq_script):
     def _exec(self, code, locals_dict, globals_dict):
 
         with ExitStack() as stack:
-            p = Path(self.parent().components['editor'].filename).dirname()
+            p = Path(self.parent().components['editor'].filename).abspath().dirname()
             if self.preferences['Add script dir to path'] and p:
-                sys.path.append(p)
+                sys.path.insert(0,p)
                 stack.callback(sys.path.remove, p)
             if self.preferences['Change working dir to script dir'] and p:
                 stack.enter_context(p)

cqgui_env.yml

@@ -17,6 +17,7 @@ dependencies:
   - requests
   - nomkl
   - ezdxf
+  - typing_extensions
   - pip
   - pip:
     - "https://github.com/CadQuery/cadquery/archive/master.zip"