Adding a tag indicating manual connection is needed when displaying interfaces

[XiaoGuo, Liu]

Currently, when I use "snap interfaces" command, it shows:

Slot Plug
bluez:service -
hello-producer:content hello-consumer
ubuntu-app-platform:platform -
:alsa -
:avahi-observe -
:bluetooth-control -
:browser-support mychrome,ss-qt
:camera -
...
:network-setup-observe -
:ofono -
:opengl mychrome,opengles-sample,ss-qt,tensorflow-demo,uitk-gallery
:openvswitch -
:openvswitch-support -
:optical-drive -
:ppp -
:process-control -
:pulseaudio mychrome
:raw-usb -
:removable-media -
:screen-inhibit-control -
:shutdown -
:snapd-control snapweb
:system-observe -
:system-trace -
:time-control -
:timeserver-control -

I am thinking whether it is good to show the slots which need to have manual connection with a "*" at the end of the display. As such:

Slot Plug
bluez:service* -
hello-producer:content hello-consumer
ubuntu-app-platform:platform -
:alsa -
:avahi-observe -
:bluetooth-control -
:browser-support mychrome,ss-qt
:camera* -
...
:network-setup-observe -
:ofono -
:opengl mychrome,opengles-sample,ss-qt,tensorflow-demo,uitk-gallery
:openvswitch -
:openvswitch-support -
:optical-drive -
:ppp -
:process-control* -
:pulseaudio mychrome
:raw-usb -
:removable-media -
:screen-inhibit-control -
:shutdown -
:snapd-control snapweb
:system-observe* -
:system-trace -
:time-control -
:timeserver-control -

For example, in the above display, "camera" is displayed as "camera*", indicating a manual connection is needed for the interface. It is clear for developer to do the right thing when developing their software.