PERF: Don't monitor files if component have been disabled

--HG--
branch : 1.x
extra : transplant_source : %7D%07%23%F0%0ED%E7%B6%00%BA%DA%5C%CBv%24z%07%1B%F2%B6

src/Orchard/Environment/Extensions/Loaders/DynamicExtensionLoader.cs

@@ -67,6 +67,9 @@ namespace Orchard.Environment.Extensions.Loaders {
         }
 
         public override void Monitor(ExtensionDescriptor descriptor, Action<IVolatileToken> monitor) {
+            if (Disabled)
+                return;
+
             // Monitor .csproj and all .cs files
             string projectPath = GetProjectPath(descriptor);
             if (projectPath != null) {

src/Orchard/Environment/Extensions/Loaders/PrecompiledExtensionLoader.cs

@@ -122,6 +122,9 @@ namespace Orchard.Environment.Extensions.Loaders {
         }
 
         public override void Monitor(ExtensionDescriptor descriptor, Action<IVolatileToken> monitor) {
+            if (Disabled)
+                return;
+
             // If the assembly exists, monitor it
             string assemblyPath = GetAssemblyPath(descriptor);
             if (assemblyPath != null) {