Remove the flags.login flag and instead trigger the login menu off of a new flag - showLoginButton
Fixed selenium tests for new login markup
converted showLoginButton to hideLoginButton
Merge pull request #682 from hatched/remove-login-flag

Remove login flag and add showLoginButton config option

We only show the user dropdown when the GUI is not in demo mode. When it is in demo mode we instead show the get started link. The charm will need to be modified to write this new configuration option so that we only show the login menu when the GUI is not installed in demo mode.