feat(UI): Use AssemblyWarning when AssemblyReference load faulted

Allow you to easily and quickly see the reference libraries not found fixes icsharpcode#2932

ILSpy/TreeNodes/AssemblyReferenceTreeNode.cs

@@ -31,6 +31,7 @@ public sealed class AssemblyReferenceTreeNode : ILSpyTreeNode
 	{
 		readonly AssemblyReference r;
 		readonly AssemblyTreeNode parentAssembly;
+		private bool? loadFualt;
 
 		public AssemblyReferenceTreeNode(AssemblyReference r, AssemblyTreeNode parentAssembly)
 		{
@@ -45,7 +46,11 @@ public AssemblyReferenceTreeNode(AssemblyReference r, AssemblyTreeNode parentAss
 			get { return Language.EscapeName(r.Name) + GetSuffixString(r.Handle); }
 		}
 
-		public override object Icon => Images.Assembly;
+		public override object Icon => loadFualt switch 
+			{
+				true => Images.AssemblyWarning,
+				_ =>  Images.Assembly
+			};
 
 		public override bool ShowExpander {
 			get {
@@ -79,9 +84,15 @@ protected override void LoadChildren()
 			var module = resolver.Resolve(r);
 			if (module != null)
 			{
+				loadFualt = false;
 				foreach (var childRef in module.AssemblyReferences)
 					this.Children.Add(new AssemblyReferenceTreeNode(childRef, parentAssembly));
 			}
+			else
+			{
+				loadFualt = true;
+			}
+			RaisePropertyChanged(nameof(Icon));
 		}
 
 		public override void Decompile(Language language, ITextOutput output, DecompilationOptions options)
@@ -100,14 +111,22 @@ public override void Decompile(Language language, ITextOutput output, Decompilat
 				output.Indent();
 				language.WriteCommentLine(output, "Assembly reference loading information:");
 				if (info.HasErrors)
+				{
 					language.WriteCommentLine(output, "There were some problems during assembly reference load, see below for more information!");
+					loadFualt = true;
+				}
+				else
+				{
+					loadFualt = false;
+				}
 				foreach (var item in info.Messages)
 				{
 					language.WriteCommentLine(output, $"{item.Item1}: {item.Item2}");
 				}
 				output.Unindent();
 				output.WriteLine();
 			}
+			RaisePropertyChanged(nameof(Icon));
 		}
 	}
 }