Brewtarget logo is missing from main window

[matty0ung]

Normally, below the big blue plus and minus symbols there should be the red "target" Brewtarget logo and the word "Brewtarget" in two shades of brown (eg see the screenshot in #609). I've just noticed on my local build that it's not there any more. I'm guessing it's some one-line error somewhere (and quite likely as an oversight on my part), but, off the bat, I can't see where. Eg I had a look at mainWindow.ui and brewtarget.qrc and couldn't see what might have changed (or when) for this to disappear.

[mikfire]

That may not be a clean merge request. It has now been years since I've done this. If it is too unclean, reject it and I will try again.