Resolve "Remember password"

Closes #141 (closed), #142 (closed), #104 (closed)

• Fix disabling on remember checkboxes

• Store passwords for drafts and the editPassword separately

• Fix clearing of draft-specific passwords

• Ensure tools show not authenticated when not authenticated for drawing or server

• Don't ask for password when set a new one (#142 (closed))

• Store privileges per draft if have a draftId in response (draft edit password)

• Look session storage issues (#102 (closed))

  • switch to using LocalStorage to store all info
  • keep copy in SessionStorage to get around deleting info on refreshes
  • listen for LocalStorage changes to update authentication between tabs
  • add onClose action to clear non-remember parts from LocalStorage on last tab close
  • store privileges in memory only
  • server should push updated privileges
  • server authenticate should check authentication for given credentials and give back privileges the credentials give for that draft - server editPassword will give back none (for now) for a draft that has its own editPassword

• ensure clients are reauthenticated:

  • when the draft editPassword is edited or added
  • when the draft editPassword is removed

• check issue with storing password after setting when there is no server editPassword

• add remember password checkbox to new draft password form