Formalize indentation settings for XamlStyler

Author: koal44

Settings.XamlStyler

@@ -7,7 +7,7 @@
     "SeparateByGroups": false,
     "AttributeIndentation": 0,
     "AttributeIndentationStyle": 1,
-    "RemoveDesignTimeReferences":  false,
+    "RemoveDesignTimeReferences": false,
     "IgnoreDesignTimeReferencePrefix": false,
     "EnableAttributeReordering": true,
     "AttributeOrderingRuleGroups": [
@@ -38,5 +38,7 @@
     "ThicknessSeparator": 2,
     "ThicknessAttributes": "Margin, Padding, BorderThickness, ThumbnailClipMargin",
     "FormatOnSave": true,
-    "CommentPadding": 2
+    "CommentPadding": 2,
+    "IndentSize": 4,
+    "IndentWithTabs": false
 }