Make HTTP(s) label consistent on clone bar

Sites that use http:// for the external_url should always display HTTP on
the clone bar. Similarly, sites that use https:// should show HTTPS.

Currently, the inconsistency looks like:

![http-magic](/uploads/945fda580f7ba5aee36cc572b49baf2b/http-magic.gif)

Also restores the tooltips that vanished in 7ba4482f:

![image](/uploads/b5a7b3e68b4992a447fcaa51915e866c/image.png)


See merge request !3319