Plugins - Added button to delete plugin settings

UI - Try to release SDKs on Windows logout/shutdown
Plugins UI - Increased width and fixed long feature names not wrapping

src/Artemis.Core/Plugins/Settings/PluginSettings.cs

@@ -17,6 +17,8 @@ namespace Artemis.Core
         internal PluginSettings(Plugin plugin, IPluginRepository pluginRepository)
         {
             Plugin = plugin;
+            Plugin.Settings = this;
+            
             _pluginRepository = pluginRepository;
             _settingEntities = new Dictionary<string, object>();
         }
@@ -65,5 +67,10 @@ namespace Artemis.Core
                 return pluginSetting;
             }
         }
+
+        internal void ClearSettings()
+        {
+            _settingEntities.Clear();
+        }
     }
 }