Remembering your passphrase

With this release you can choose how long your passphrase should be remembered or not at all if you don't want to. If you have a long and secure passphrase you may find it tedious to type it in every time you need a password when you know your computer has not been at risk at all in the meantime. So let this plugin remember your passphrase for a short time and let it automatically forget it when you close your browser or you log out manually.