Plugins - Allow config window to be mandatory

UI - Move profile editor into Profile screen, profile page no longer always has to show the editor

src/Artemis.Core/Plugins/IPluginConfigurationDialog.cs

@@ -11,4 +11,10 @@ public interface IPluginConfigurationDialog
     ///     The type of view model the tab contains
     /// </summary>
     Type Type { get; }
+
+    /// <summary>
+    ///     A value indicating whether it's mandatory to configure this plugin.
+    ///     <remarks>If set to <see langword="true"/>, the dialog will open the first time the plugin is enabled.</remarks>
+    /// </summary>
+    bool IsMandatory { get; }
 }