Confirmation on actions

[windware-ono]

When I add a new transaction, it doesn't show any notification but silently gets added but it would be nice to see some notification like 'Trasnaction added' or something similar.

Also, when I delete a transaction by pressing the trash icon, it gets deleted with no confirmation, so, I think it's better to have a little popup of Yes/No in case of accidentally pressing the trash icon.