Make as must of the log viewer internal as possible

src/Umbraco.Core/Logging/Viewer/CountingFilter.cs

@@ -3,7 +3,7 @@ using Serilog.Events;
 
 namespace Umbraco.Core.Logging.Viewer
 {
-    public class CountingFilter : ILogFilter
+    internal class CountingFilter : ILogFilter
     {
         public CountingFilter()
         {

src/Umbraco.Core/Logging/Viewer/ErrorCounterFilter.cs

@@ -2,7 +2,7 @@
 
 namespace Umbraco.Core.Logging.Viewer
 {
-    public class ErrorCounterFilter : ILogFilter
+    internal class ErrorCounterFilter : ILogFilter
     {
         public int Count { get; private set; }
 

src/Umbraco.Core/Logging/Viewer/ExpressionFilter.cs

@@ -6,7 +6,7 @@ using Serilog.Filters.Expressions;
 namespace Umbraco.Core.Logging.Viewer
 {
     //Log Expression Filters (pass in filter exp string)
-    public class ExpressionFilter : ILogFilter
+    internal class ExpressionFilter : ILogFilter
     {
         private readonly Func<LogEvent, bool> _filter;
         private const string ExpressionOperators = "()+=*<>%-";

src/Umbraco.Core/Logging/Viewer/JsonLogViewer.cs

@@ -7,7 +7,7 @@ using Serilog.Formatting.Compact.Reader;
 
 namespace Umbraco.Core.Logging.Viewer
 {
-    public class JsonLogViewer : LogViewerSourceBase
+    internal class JsonLogViewer : LogViewerSourceBase
     {
         private readonly string _logsPath;
 

src/Umbraco.Core/Logging/Viewer/MessageTemplateFilter.cs

@@ -3,7 +3,7 @@ using Serilog.Events;
 
 namespace Umbraco.Core.Logging.Viewer
 {
-    public class MessageTemplateFilter : ILogFilter
+    internal class MessageTemplateFilter : ILogFilter
     {
         public readonly Dictionary<string, int> Counts = new Dictionary<string, int>();