Log errors when a plugin's control throws exceptions instead of just letting WPF die.

Also add some new types for Essentials

Torch.Server/ViewModels/PluginViewModel.cs

@@ -5,6 +5,7 @@ using System.Text;
 using System.Threading.Tasks;
 using System.Windows;
 using System.Windows.Controls;
+using NLog;
 using Torch.API;
 using Torch.API.Plugins;
 using Torch.Server.Views;
@@ -17,13 +18,25 @@ namespace Torch.Server.ViewModels
         public string Name { get; }
         public ITorchPlugin Plugin { get; }
 
+        private static Logger _log = LogManager.GetCurrentClassLogger();
+
         public PluginViewModel(ITorchPlugin plugin)
         {
             Plugin = plugin;
 
             if (Plugin is IWpfPlugin p)
-                Control = p.GetControl();
-
+            {
+                try
+                {
+                    Control = p.GetControl();
+                }
+                catch (Exception ex)
+                {
+                    _log.Error(ex, $"Exception loading interface for plugin {Plugin.Name}! Plugin interface will not be available!");
+                    Control = null;
+                }
+            }
+            
             Name = $"{plugin.Name} ({plugin.Version})";
 
             ThemeControl.UpdateDynamicControls += UpdateResourceDict;