Success decryption doesn't work

[thanhnguyen2187]

It seems to be because of the changes in #3, which make context.notes gets reloaded every time Idling is entered. To be more precise, the state transitions are:

1. Idling: the "normal" screen
2. Idling.PasswordDecrypt: the password prompt
3. DataDecrypting: the decryption
4. Idling: the "normal" screen

When the state transits from step 3 to step 4, within context, note gets recorded and the relevant element in notes is mutated as well, but the mutation is overrode by entering Idling.

We have two ways to solve this:

• On entering Idling, compare each of the fetched records with context.note, then change matched record.
• Rearrange the state machine so that entering Idling doesn't reload context.notes.

[thanhnguyen2187]

Should be resolved by https://github.com/thanhnguyen2187/cryptaa/pull/13/commits/3bde0b0779393e990c00a6c0322735ce1826701d after #13 is merged.