Add new serialization formatting options for old things we did hacks for

We used to store these in multiple regstry keys, but we don't care about
that anymore since there's nothing important to maintain backwards
compatibility with. This breaks syncing of the setting between
different versions of Visual Studio, but that's not terribly important.

src/Workspaces/CSharp/Portable/Formatting/CSharpFormattingOptions.cs

@@ -75,8 +75,8 @@ public static class CSharpFormattingOptions
         public static Option<bool> SpaceBeforeSemicolonsInForStatement { get; } = new Option<bool>(nameof(CSharpFormattingOptions), nameof(SpaceBeforeSemicolonsInForStatement), defaultValue: false,
             storageLocations: new RoamingProfileStorageLocation("TextEditor.CSharp.Specific.SpaceBeforeSemicolonsInForStatement"));
 
-        // This property is currently serialized into multiple properties
-        public static Option<BinaryOperatorSpacingOptions> SpacingAroundBinaryOperator { get; } = new Option<BinaryOperatorSpacingOptions>(nameof(CSharpFormattingOptions), nameof(SpacingAroundBinaryOperator), defaultValue: BinaryOperatorSpacingOptions.Single);
+        public static Option<BinaryOperatorSpacingOptions> SpacingAroundBinaryOperator { get; } = new Option<BinaryOperatorSpacingOptions>(nameof(CSharpFormattingOptions), nameof(SpacingAroundBinaryOperator), defaultValue: BinaryOperatorSpacingOptions.Single,
+            storageLocations: new RoamingProfileStorageLocation("TextEditor.CSharp.Specific.SpacingAroundBinaryOperator"));
 
         public static Option<bool> IndentBraces { get; } = new Option<bool>(nameof(CSharpFormattingOptions), nameof(IndentBraces), defaultValue: false,
             storageLocations: new RoamingProfileStorageLocation("TextEditor.CSharp.Specific.OpenCloseBracesIndent"));
@@ -90,8 +90,8 @@ public static class CSharpFormattingOptions
         public static Option<bool> IndentSwitchCaseSection { get; } = new Option<bool>(nameof(CSharpFormattingOptions), nameof(IndentSwitchCaseSection), defaultValue: true,
             storageLocations: new RoamingProfileStorageLocation("TextEditor.CSharp.Specific.IndentSwitchCaseSection"));
 
-        // This property is currently serialized into multiple properties
-        public static Option<LabelPositionOptions> LabelPositioning { get; } = new Option<LabelPositionOptions>(nameof(CSharpFormattingOptions), nameof(LabelPositioning), defaultValue: LabelPositionOptions.OneLess);
+        public static Option<LabelPositionOptions> LabelPositioning { get; } = new Option<LabelPositionOptions>(nameof(CSharpFormattingOptions), nameof(LabelPositioning), defaultValue: LabelPositionOptions.OneLess,
+            storageLocations: new RoamingProfileStorageLocation("TextEditor.CSharp.Specific.LabelPositioning"));
 
         public static Option<bool> WrappingPreserveSingleLine { get; } = new Option<bool>(nameof(CSharpFormattingOptions), nameof(WrappingPreserveSingleLine), defaultValue: true,
             storageLocations: new RoamingProfileStorageLocation("TextEditor.CSharp.Specific.WrappingPreserveSingleLine"));