TAS connection not always named properly

[andrew-woosnam]

When logging into TAS, the resulting connection isn't always labeled according to the name entered into the "Connection Name" login field.

Best guess as to why this is happening: the state of the login view model is only updated to record the preferred nickname for the connection when that field loses focus. i.e. the name value will stay null (resulting in the default host name for the TAS connection) if a nickname is entered into the Connection Name field and no action is made (e.g. click/tab away from field) to cause the name field to lose focus before moving on to the next page of the dialog (e.g. by pressing ENTER)