Added themes

DiscordBotUI/WindowsForms/MainWindow.cs

@@ -1,27 +1,32 @@
-using System;
-using System.Collections.Generic;
-using System.ComponentModel;
-using System.Data;
-using System.Drawing;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
-using System.Windows.Forms;
-
-namespace DiscordBotUI_Windows.WindowsForms
+namespace DiscordBotUI_Windows.WindowsForms
 {
     public partial class MainWindow : Form
     {
-        public MainWindow()
+        internal MainWindow()
         {
             InitializeComponent();
-
             Load += (_, _) => MainWindowLoad();
+            FormClosed += async (_, _) =>
+            {
+                await Config.ApplicationSettings.SaveToFile();
+            };
         }
 
         private void MainWindowLoad()
         {
-            pluginListToolStripMenuItem.Click += (_, _) => new PluginListWindow().Show();
+            pluginListToolStripMenuItem.Click += (_, _) =>
+            {
+                var form = new PluginListWindow();
+                Config.ThemeManager.SetFormTheme(Config.ThemeManager.CurrentTheme, form);
+                form.Show();
+            };
+            themesToolStripMenuItem.Click += (_, _) => {
+                themesToolStripMenuItem.DropDownItems.Clear();
+                foreach(var theme in Config.ThemeManager._InstalledThemes)
+                {
+                    themesToolStripMenuItem.DropDownItems.Add(theme.Name, null, (_, _) => Config.ThemeManager.SetFormTheme(theme, this));
+                }
+            };
         }
     }
 }