Display a diceware suggestion when creating the Persistent Storage
None of the test participant in January would have used it but it reflects the recommendation for passphrase that we've had on our installation instructions for years:
diceware package includes several work list: en_eff, en_orig, and en_securedrop.
The original word list includes offensive terms like 'negro' but other orgs like the EFF have created better lists. I prefer the SecureDrop list because it uses shorter words in addition to a few numbers:
symptom slug irk uncork crummy exemplary purity revision alone pantry wildfowl consuming relearn gizmo green olive exit trembling rants reimburse driver falsify haziness paycheck sputter drudge cyclic mushroom catcher copartner
spans rep path loaf leon kiev memoir 1925 drops tunic mimosa politic coors fuzz single macho vest use kaput yeats voodoo 678 hip indies mode soak trash neil shale joins