Prevent CDL's "Disassemble..." when not implemented crashing EmuHawk

(by disabling the button)
see #1274

src/BizHawk.Client.EmuHawk/tools/CDL.cs

@@ -108,6 +108,8 @@ public CDL()
 
 		public override void Restart()
 		{
+			DisassembleMenuItem.Tag = CodeDataLogger.GetType().GetMethod(nameof(ICodeDataLogger.DisassembleCDL))!
+				.IsImplemented();
 			//don't try to recover the current CDL!
 			//even though it seems like it might be nice, it might get mixed up between games. even if we use CheckCDL. Switching games with the same memory map will be bad.
 			_cdl = null;
@@ -283,8 +285,8 @@ private void FileSubMenu_DropDownOpened(object sender, EventArgs e)
 			SaveAsMenuItem.Enabled =
 				AppendMenuItem.Enabled =
 				ClearMenuItem.Enabled =
-				DisassembleMenuItem.Enabled =
 				_cdl != null;
+			DisassembleMenuItem.Enabled = _cdl is not null && /*core implements feature*/(bool) DisassembleMenuItem.Tag;
 
 			miAutoSave.Checked = CDLAutoSave;
 			miAutoStart.Checked = CDLAutoStart;