If folder name is given as command-line argument, try to use it as DF folder

Author: Pidgeot

core/df.py

@@ -28,6 +28,8 @@ def find_df_folder():
     find_df_folders()
     if len(lnp.folders) == 1:
         set_df_folder(lnp.folders[0])
+    if len(sys.argv) > 1 and sys.argv[1] in lnp.folders:
+        set_df_folder(sys.argv[1])
 
 def set_df_folder(path):
     """