GUI improvements.Favourites in the details window;

[pseudosamri]

One or both of the following would make a more user friendly user interface:
(implicit use in layout, where tree is top LHS; details bottom LHS; image RHS )
A) make the Favorites.Icon, and the corresponding Favoruites.path, a dragable feature, so that:
a) one could thus have 2 lines associated with the bottom LHS, namely
1) the favourite;s icon :: the favourites path (which can sometimes be quite long);
2) 2nd line, the rest of the details view icons;
b) why? this makes info easier when one has a small screen, OR when one has many windows opened, only one
of which is XnView.

B) alternatively, do A),
but with the 2nd line oc icons associated with the LHS.bottom detail window, allowed to be verticle.
a) Note, by making the individual lines suggested dragable, then one has up to 4 permutations, the default
would mimic the current operational layout.