#112 Add menu item "Connect/Disconnect" to connect menu

[Franz Zieris]

The "connect/disconnect"-button offers a drop-down menu for selecting additional accounts (if any) and for adding new/configuring existing accounts.
But the default action (toggling the connection status) is missing in this list, which seems not to be the usual Eclipse way.

The task: Add a new entry labeled like the tooltip of the combo-button on top of the others.