Improve exception message

Author: pcastornii

mvvm4fx-core/src/main/java/com/techsenger/mvvm4fx/core/AbstractComponentView.java

@@ -47,8 +47,9 @@ public T getViewModel() {
     public final void initialize() {
         var descriptor = this.viewModel.getDescriptor();
         try {
-            if (descriptor.stateWrapper().get() != ComponentState.CREATING) {
-                throw new IllegalStateException("Unexpected state of the component");
+            var currentState = descriptor.stateWrapper().get();
+            if (currentState != ComponentState.CREATING) {
+                throw new IllegalStateException("Unexpected state of the component - " + currentState.name());
             }
             preInitialize(viewModel);
             descriptor.stateWrapper().set(ComponentState.INITIALIZING);
@@ -75,8 +76,9 @@ public final void initialize() {
     public final void deinitialize() {
         var descriptor = this.viewModel.getDescriptor();
         try {
-            if (descriptor.stateWrapper().get() != ComponentState.INITIALIZED) {
-                throw new IllegalStateException("Unexpected state of the component");
+            var currentState = descriptor.stateWrapper().get();
+            if (currentState != ComponentState.INITIALIZED) {
+                throw new IllegalStateException("Unexpected state of the component - " + currentState.name());
             }
             preDeinitialize(viewModel);
             descriptor.stateWrapper().set(ComponentState.DEINITIALIZING);