Plugins - Added descriptions

Settings - Plugin settings tab
UI - Catch exceptions during exception dialog display
Plugins - Implemented enable/disable of plugins (WIP)
Novation - Added Launchpad Mini layout and image

src/Plugins/Artemis.Plugins.Devices.DMX/plugin.json

@@ -1,6 +1,7 @@
 {
   "Guid": "6f073d4d-d97d-4040-9750-841fdbe06915",
   "Name": "DMX Devices",
+  "Description": "Allows Artemis to control lighting on DMX controllers via a COM port.",
   "Version": "1.0.0.0",
   "Main": "Artemis.Plugins.Devices.DMX.dll"
 }