Rewrite Database connection way
Created by: Bscode1
Store database into a class instead of dictionary. Base on change of storage method, rewrite the some codes relate to connection of database in QtApplication.py and QtLoginDialog.py.
Created by: Bscode1
Store database into a class instead of dictionary. Base on change of storage method, rewrite the some codes relate to connection of database in QtApplication.py and QtLoginDialog.py.