Misc cleanup (#708)

* Fix typos

* Remove unneeded using statements

* Enforce var style more

* Remove redundant qualifiers

* Fix some indentation

* Disable naming warnings on files with external enum names

* Fix build

* Mass find & replace for comments with no spacing

* Standardize todo capitalization and for/if spacing

Ryujinx.HLE/HOS/Services/Friend/IFriendService.cs

@@ -108,7 +108,7 @@ namespace Ryujinx.HLE.HOS.Services.Friend
             long position = context.Request.PtrBuff[0].Position;
             long size     = context.Request.PtrBuff[0].Size;
 
-            //Todo: Write the buffer content.
+            // TODO: Write the buffer content.
 
             Logger.PrintStub(LogClass.ServiceFriend, new { UserId = uuid.ToString(), unknown0 });