New tab emits "load-stop" signal

[samwwwblack]

Creating a new tab causes the "load-stop" signal to be emitted, running the associated webcontent.progressMonitor code.
This changes the Go/Refresh/Stop button to Refresh and calls faviconUpdate on an empty URI.

[benfrancis]

Hmm, I thought this might be caused by a conditional in the newTab function always evaluating to true so that the navigate() function is called regardless of whether a URL was passed to the function... but I get the same behaviour even if I comment out the navigate() call so I'm not sure what is causing this