[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

Application/Factories/DatabaseContextFactory.cs

@@ -0,0 +1,21 @@
+using SharedLibraryCore.Database;
+using SharedLibraryCore.Interfaces;
+
+namespace IW4MAdmin.Application.Factories
+{
+    /// <summary>
+    /// implementation of the IDatabaseContextFactory interface
+    /// </summary>
+    public class DatabaseContextFactory : IDatabaseContextFactory
+    {
+        /// <summary>
+        /// creates a new database context
+        /// </summary>
+        /// <param name="enableTracking">indicates if entity tracking should be enabled</param>
+        /// <returns></returns>
+        public DatabaseContext CreateContext(bool? enableTracking = true)
+        {
+            return enableTracking.HasValue ? new DatabaseContext(disableTracking: !enableTracking.Value) : new DatabaseContext();
+        }
+    }
+}