Reduce cells border width on big grids

android/gradle.properties

 org.gradle.jvmargs=-Xmx1536M
 android.useAndroidX=true
 android.enableJetifier=true
-app.versionName=0.0.37
-app.versionCode=37
+app.versionName=0.0.38
+app.versionCode=38

fastlane/metadata/android/en-US/changelogs/38.txt

+Reduce cells border width on big grids.

fastlane/metadata/android/fr-FR/changelogs/38.txt

+Diminution de l'épaisseur des bordures des cellules sur les grandes grilles.

lib/entities/cell.dart

@@ -13,7 +13,6 @@ class Cell {
     @required this.isFixed,
   );
 
-  static double cellBorderWidth = 3;
   static Color cellBorderDarkColor = Colors.black;
   static Color cellBorderLightColor = Colors.grey;
   static Color cellBorderSelectedColor = Colors.red;
@@ -130,6 +129,15 @@ class Cell {
     int blockSizeHorizontal = myProvider.blockSizeHorizontal;
     int blockSizeVertical = myProvider.blockSizeVertical;
 
+    double cellBorderWidth = 4;
+
+    if (blockSizeVertical * blockSizeHorizontal > 8) {
+        cellBorderWidth = 2;
+        if (blockSizeVertical * blockSizeHorizontal > 10) {
+            cellBorderWidth = 1;
+        }
+    }
+
     Border borders = Border.all(
       color: cellBorderSelectedColor,
       width: cellBorderWidth,