changing location of chanedata folder
Already done in nightly builds at https://builder.musicoin.org/
Dropdown menu on the "Sent" function from an adressbook
Is not done because, if you clicking on to send from, the accounts lists, you most likely want to send from the account you clicked on. Send Funds and Sends Funds from the menu has the dropdown, since you not selecting special account. Adding dropdown here, could confuse user, as she/he could select another account, but not the one he/she clicked on.