--- a/ui/mainwindow.h	Wed Apr 16 10:00:17 2014 +0200
+++ b/ui/mainwindow.h	Wed Apr 16 10:01:02 2014 +0200
@@ -43,7 +43,8 @@
         BeforeDownload,
         NewListAvailable,
         NewSoftwareAvailable,
-        TransferError
+        TransferError,
+        NothingChanged
     };
     CurrentState getState() {return mCurState;}
     void setState(CurrentState state) {mCurState = state;}
@@ -64,6 +65,7 @@
     void showDetails(QListWidgetItem*);
     void resizeButtons();
     void installerError(const QString& errMsg);
+    void installerSuccess();
     void installCerts();
 
     /** @brief saves the currently unselected certificates
@@ -93,8 +95,8 @@
      * Do not use this as a trust check as this only works on
      * FileNames where the underlying files can change. This
      * is just meant to check if the downloaded data was somehow
-     * removed or corrupted.
-     *
+     * removed or corrupted. It also initializes mListToInstall
+     * and mInstalledList.
      */
     void verifyAvailableData();
     void createTrayIcon();
@@ -122,6 +124,8 @@
 
     /* The current list that should be installed */
     CertificateList mListToInstall;
+    /* The last list that we installed */
+    CertificateList mInstalledList;
     /* Previously made "unselect" choices in the form of
      * base64lines with I:/R: prefix */
     QStringList mPreviouslyUnselected;