feat: set SysBox to green if connect successfully

CCXXXI · CCXXXI · commit 63e022d01fee · 2022-07-13T13:24:17.000+08:00
diff --git a/frmMain.vb b/frmMain.vb
@@ -2326,6 +2326,7 @@ LocalErrorHandler:
         If Not client.Connect() Then
             Return
         End If
+        SysBox.BackColor = Color.Green
 
         While True
             If client.Check() Then
