Correct wrong bl_idname for preferences, trigger redraw after packagelist change

package_manager/bpkg/types.py

@@ -166,6 +166,9 @@ class Package:
             raise BadAddon("Module does not appear to be an addon; no bl_info attribute") from err
         return pkg
 
+    def __repr__(self) -> str:
+        # return self.name
+        return "Package('name': {}, 'version': {})".format(self.name, self.version)
 
 class Repository:
     """