Data models - Added ClearDynamicChildren method

Plugins - Added async support for timed updates
Plugins - Added dialog host to plugin settings window
Data model visualization - Fixed some null references
Data model visualization - Added check to ensure parameterless getters are present

src/Artemis.UI.Shared/DataModelVisualization/Shared/DataModelListViewModel.cs

@@ -121,7 +121,7 @@ namespace Artemis.UI.Shared
         /// <inheritdoc />
         public override string ToString()
         {
-            return $"[List] {DisplayPath ?? Path} - {List.Count} item(s)";
+            return $"[List] {DisplayPath ?? Path} - {List?.Count ?? 0} item(s)";
         }
     }
 }

src/Artemis.UI.Shared/DataModelVisualization/Shared/DataModelPropertyViewModel.cs

@@ -57,7 +57,9 @@ namespace Artemis.UI.Shared
         /// <inheritdoc />
         public override string ToString()
         {
-            return $"[{DisplayValueType.Name}] {DisplayPath ?? Path} - {DisplayValue}";
+            if (DisplayValueType != null)
+                return $"[{DisplayValueType.Name}] {DisplayPath ?? Path} - {DisplayValue}";
+            return $"{DisplayPath ?? Path} - {DisplayValue}";
         }
     }
 }

src/Artemis.UI.Shared/DataModelVisualization/Shared/DataModelVisualizationViewModel.cs

@@ -193,6 +193,9 @@ namespace Artemis.UI.Shared
                     continue;
                 if (propertyInfo.GetCustomAttribute<DataModelIgnoreAttribute>() != null)
                     continue;
+                MethodInfo getMethod = propertyInfo.GetGetMethod();
+                if (getMethod == null || getMethod.GetParameters().Any())
+                    continue;
 
                 DataModelVisualizationViewModel child = CreateChild(dataModelUIService, childPath, GetChildDepth());
                 if (child != null)