Patch from issue 975 on behalf of Phil: "Proposition of a patch right Pannel (new visual rendering <-> icons instead of text)"

It moreover better handle workflow changes: no need to restart RT for some options.

rtgui/options.h

@@ -155,6 +155,7 @@ class Options {
     bool squareDetailWindow;
     bool FileBrowserToolbarSingleRow;
     bool hideTPVScrollbar;
+    bool UseIconNoText;
 
     bool menuGroupRank;
     bool menuGroupLabel;