Use SSID (service name) in details tab dropdown instead of connection string

I frequently have 30+ wifi networks within range of my laptop. Finding a certain one to view in the details tab is currently difficult because I have to compare the connection wifi_MAC_hex(SSID)_managed_psk string from the status tab to the long list in the dropdown. 

This pull request puts the SSIDs in the dropdown instead, and puts the connection string in the details pane below it. 

If you want to keep using the connection strings in the dropdown, I would be happy to include an option to make this configurable, or any other changes you need if you don't want to merge as is. Just leave a comment on the pull request and I'll push changes to the branch. (Also let me know if you want me to open an issue before sending pull requests.)