Loader actions fix.

[tokejepsen]

Fix for error when running actions;

Traceback (most recent call last):
  File "C:\Users\admin\bumpybox_development\pype-setup\repos\avalon-core\avalon\tools\libraryloader\widgets.py", line 334, in on_context_menu
    representation=representation
  File "C:\Users\admin\bumpybox_development\pype-setup\repos\avalon-core\avalon\tools\libraryloader\lib.py", line 294, in load
    loader = Loader(context)
  File "C:\Users\admin\bumpybox_development\pype-setup\repos\avalon-core\avalon\pipeline.py", line 193, in __init__
    if project_doc and project_doc["name"] != Session["AVALON_PROJECT"]:
KeyError: 'AVALON_PROJECT'

[iLLiCiTiT]

Good for me