Merge pull request #306 from ales-erjavec/fixes/styles-dirname

[FIX] styles: Fix package base path

orangecanvas/styles/__init__.py

@@ -189,4 +189,4 @@ def process_qss(content: str, base: str):
         return stylesheet_string, []
     else:
         return process_qss(stylesheet_string.decode("utf-8"),
-                           os.path.basename(__file__))
+                           os.path.dirname(__file__))