Fixed: extra plugin icons breaking fullscreen tools UI

Previously, the addition of the autoscroll icon to the toolbar meant that in fullscreen grid mode, the diva-right-tools spilled off of the toolbox because the 'Pages per row' label is wider than the 'Zoom level' label.

Now, we don't declare a width so that the toolbar size changes dynamically based on the width of the items within it, so the layout is never broken. (CSS overhauls coming for version 4.0).

source/css/diva.less

@@ -104,7 +104,6 @@
         top: 0px;
         right: 30px;
         z-index: @fullscreenZIndex + 1;
-        width: 230px;
         height: 73px;
         padding: 15px;
         .frame(@toolsFrame);