Allow stored pull-secret to be changed

Author: gbraad

Diff for: CRCTray.cs

@@ -248,7 +248,7 @@ async private void StartMenu_Click(object sender, EventArgs e)
                 var pullSecretContent = pullSecretForm.PullSecret;
                 if (pullSecretContent == String.Empty)
                 {
-                    TrayIcon.NotifyWarn(@"No Pull Secret was provided, Cannot start cluster without pull secret.");
+                    TrayIcon.NotifyWarn(@"No Pull Secret was provided. Cannot start cluster without pull secret.");
                     return;
                 }