Make scrollbar as wide as 1 mono char

kstyle/breeze.h

@@ -93,7 +93,7 @@ namespace Breeze
         MenuBarItem_MarginHeight = 6,
 
         // scrollbars
-        ScrollBar_Extend = 21,
+        ScrollBar_Extend = 10,
         ScrollBar_SliderWidth = 6,
         ScrollBar_MinSliderHeight = 20,
         ScrollBar_NoButtonHeight = (ScrollBar_Extend-ScrollBar_SliderWidth)/2,
@@ -175,11 +175,11 @@ namespace Breeze
 
         // The standard pen stroke width for shadows.
         static constexpr int Shadow = 1;
-        
+
         // A value for pen width arguments to make it clear that there is no pen stroke
         static constexpr int NoPen = 0;
     }
-    
+
     //* animation mode
     enum AnimationMode
     {