Added ability to change minimal quality during runtime

main.py

@@ -165,6 +165,7 @@ commands = [
     ('save', directory, 'Change the download directory'),
     ('search', search, 'Search the selected site'),
     ('sites', choose_site, 'Pick the site to search'),
+    ('quality', quality, 'Set the minimal quality to download without confirmation'),
     ('quit', quit, 'Quit the program')
 ]