Added a progressbar to ConfigurationWizard.

It resizes the provider list, pushing it down to show the progressbar
up, and back to the original layout after the operation.
Removed a silly toast that should not be shown.
Dashboard progressbar lives below the status line.

I've renamed configuration wizard progressbar, because both had the same
name and that provoked a conflict.
ProviderAPI broadcasts progress for log in process

Login progress bar advances according to the srp stages.
ProgressBar xml is loaded correctly.
Login and Logout progressbars advance correctly.

Next step: prettify.