Correctly implemented Dispose for update-triggers

RGB.NET.Core/RGBSurface.cs

@@ -139,6 +139,10 @@ namespace RGB.NET.Core
                 try { deviceProvider.Dispose(); }
                 catch { /* We do what we can */ }
 
+            foreach (IUpdateTrigger updateTrigger in _updateTriggers)
+                try { updateTrigger.Dispose(); }
+                catch { /* We do what we can */ }
+
             _ledGroups.Clear();
             _devices = null;
             _deviceProvider = null;

RGB.NET.Core/Update/AbstractUpdateTrigger.cs

@@ -5,7 +5,7 @@ namespace RGB.NET.Core
     /// <summary>
     /// Represents a generic update trigger. 
     /// </summary>
-    public class AbstractUpdateTrigger : AbstractBindable, IUpdateTrigger
+    public abstract class AbstractUpdateTrigger : AbstractBindable, IUpdateTrigger
     {
         #region Events
 
@@ -31,8 +31,7 @@ namespace RGB.NET.Core
         protected virtual void OnUpdate(CustomUpdateData updateData = null) => Update?.Invoke(this, updateData);
 
         /// <inheritdoc />
-        public virtual void Dispose()
-        { }
+        public abstract void Dispose();
 
         #endregion
     }

RGB.NET.Core/Update/Devices/DeviceUpdateTrigger.cs

@@ -144,6 +144,9 @@ namespace RGB.NET.Core
                 UpdateFrequency = UpdateRateHardLimit;
         }
 
+        /// <inheritdoc />
+        public override void Dispose() => Stop();
+
         #endregion
     }
 }

RGB.NET.Core/Update/TimerUpdateTrigger.cs

@@ -106,6 +106,9 @@ namespace RGB.NET.Core
             }
         }
 
+        /// <inheritdoc />
+        public override void Dispose() => Stop();
+
         #endregion
     }
 }