Fix hotkey dialog so that hotkeys update upon clicking the save button

BizHawk.MultiClient/MainForm.MenuItems.cs

@@ -319,6 +319,11 @@ namespace BizHawk.MultiClient
 		{
 			BizHawk.MultiClient.tools.HotkeyWindow h = new BizHawk.MultiClient.tools.HotkeyWindow();
 			h.ShowDialog();
+            if (h.DialogResult == DialogResult.OK)
+            {
+                InitControls();
+                SyncControls();
+            }
 		}
 
 		private void displayFPSToolStripMenuItem_Click(object sender, EventArgs e)

BizHawk.MultiClient/config/HotkeyWindow.cs

@@ -111,7 +111,7 @@ namespace BizHawk.MultiClient.tools
             Global.Config.SelectSlot8 = IDW_ST8.Text;
             Global.Config.SelectSlot9 = IDW_ST9.Text;
             Global.Config.ToolBox = IDW_TOOLBOX.Text;
-            
+            this.DialogResult = DialogResult.OK;
             this.Close();
         }