Bugfix from 'relation-weight-visualisation'

Author: ernstaii

DsmSuite.DsmViewer.View/Resources/Themes/LightTheme.xaml

@@ -28,7 +28,7 @@
     <SolidColorBrush x:Key="MatrixColorMatch" po:Freeze="True">#ff0000</SolidColorBrush>
     <SolidColorBrush x:Key="MatrixColorBookmark" po:Freeze="True">#00ff00</SolidColorBrush>
 
-    <SolidColorBrush x:Key="CellWeightColor" po:Freeze="True">#000000</SolidColorBrush>
+    <SolidColorBrush x:Key="CellWeightColor" po:Freeze="True">#606060</SolidColorBrush>
 
     <sys:Double x:Key="HighlightFactorHovered" >1.1</sys:Double>
     <sys:Double x:Key="HighlightFactorSelected" >1.2</sys:Double>

DsmSuite.DsmViewer.ViewModel/Matrix/MatrixViewModel.cs

@@ -599,6 +599,8 @@ private void DefineCellContent()
                     int i = buckets.Count-1;
                     while (_cellWeights[row][column] < buckets[i])
                         i--;
+                    if (i == 0)     // Bucket 0 is for weight 0 exclusively
+                        i = 1;
                     _weightPercentiles[row].Add(i / (double) _nrWeightBuckets);
                 }
             }