[misc bug fixes]

properly hide broadcast failure messages if ignore connection lost is turned on
fix concurent issue for update stats history that happened with new event processing
make get/set additional property thread safe
add ellipse to truncated chat messages on home

SharedLibraryCore/Interfaces/IDatabaseContextFactory.cs

@@ -0,0 +1,17 @@
+using SharedLibraryCore.Database;
+
+namespace SharedLibraryCore.Interfaces
+{
+    /// <summary>
+    /// describes the capabilities of the database context factory
+    /// </summary>
+    public interface IDatabaseContextFactory
+    {
+        /// <summary>
+        /// create or retrieves an existing database context instance
+        /// </summary>
+        /// <param name="enableTracking">indicated if entity tracking should be enabled</param>
+        /// <returns>database context instance</returns>
+        DatabaseContext CreateContext(bool? enableTracking = true);
+    }
+}

SharedLibraryCore/Interfaces/IPropertyExtender.cs

@@ -0,0 +1,23 @@
+namespace SharedLibraryCore.Interfaces
+{
+    /// <summary>
+    /// describes the capability of extending properties by name
+    /// </summary>
+    interface IPropertyExtender
+    {
+        /// <summary>
+        /// adds or updates property by name
+        /// </summary>
+        /// <param name="name">unique name of the property</param>
+        /// <param name="value">value of the property</param>
+        void SetAdditionalProperty(string name, object value);
+
+        /// <summary>
+        /// retreives a property by name
+        /// </summary>
+        /// <typeparam name="T"></typeparam>
+        /// <param name="name">name of the property</param>
+        /// <returns>property value if exists, otherwise default T</returns>
+        T GetAdditionalProperty<T>(string name);
+    }
+}