1) fixed a bug: creating a new goods while adding a purchase 2) fixed a bug: adding a new purchases list fragment on each device rotation
1) fixed a bug: user input reset on device rotation
1) fixed a bug: closing all cursor to prevent database locks
1) fixed a bug: database already closed
got rid of setTag/getTag
a bug that kept accepted purchases in the list forever
keep screen on if the user started to accept purchases