minor comment added
minor comment added
some changes to the "attach..." and "set target"... menu behaviours...

…if there are no valid options, then a proper message will appear to
that effect. Also there is no more “immediate” connection when there is
only one option: I prefer the user to go through the selection of the
only available option, as it’s less jarring. User has to know exactly
what she’s attaching to or connecting to.
checking in some tests related to previous commit
checkpoint. finishing upload of tests for previous commit