enhancement to faces check

[jean-daniel dodin]

Hello,

I'm just now working on updating faces on my Digikam collection.

It works pretty well. But I may suggest some cosmetic changes.

* I assigned alt V as shortcut for add a face rectangle, it works well

* adding faces is mostly done with the mouse. For me, right handed, 
switching photos can't be done with the arrows, at the other side of the 
keyboard (right hand on the mouse), so I do it with the mouse, but it's 
not handy to use the small <> on the top left os the image. It would be 
much better to have a button on the middle of each side of the image as 
on most photo display

* Pretty often, when there are groups, Digikam opens a lot of "who is" 
prompt and it's not easy to know what face is for what prompt. The 
relevant face should be enhanced when the focus is on any prompt.

thanks
jdd