Bug 241424 proxy panel not shown second time if it's not needed first time

patch by ajschult@mindspring.com r=dveditz sr=bryner

xpinstall/wizard/unix/src2/nsInstallDlg.cpp

@@ -112,6 +112,9 @@ nsInstallDlg::Back(GtkWidget *aWidget, gpointer aData)
     gtk_signal_disconnect(GTK_OBJECT(gCtx->back), gCtx->backID);
     gtk_signal_disconnect(GTK_OBJECT(gCtx->next), gCtx->nextID);
 
+    if (bDownload && sDLTable)
+        gtk_widget_hide(sDLTable);
+
     // show the last dlg
     if (gCtx->opt->mSetupType == (gCtx->sdlg->GetNumSetupTypes() - 1))
         gCtx->cdlg->Show(nsXInstallerDlg::BACKWARD_MOVE);
@@ -393,11 +396,6 @@ nsInstallDlg::Show(int aDirection)
 
     if (mWidgetsInit == FALSE)
     {
-        int bCus = 
-            (gCtx->opt->mSetupType == (gCtx->sdlg->GetNumSetupTypes() - 1));
-        nsComponentList *comps = 
-            gCtx->sdlg->GetSelectedSetupType()->GetComponents(); 
-
         // create a new table and add it as a page of the notebook
         mTable = gtk_table_new(4, 1, FALSE);
         gtk_notebook_append_page(GTK_NOTEBOOK(gCtx->notebook), mTable, NULL);
@@ -414,11 +412,9 @@ nsInstallDlg::Show(int aDirection)
 			GTK_FILL, 20, 20);
         gtk_widget_show(sMsg0Label);
 
-        if (!nsXIEngine::ExistAllXPIs(bCus, comps, &totalComps))
+        // Proxy Settings
-        {
         // insert a [ x ] heterogenous table
         sDLTable = gtk_table_new(2, 2, FALSE);
-            gtk_widget_show(sDLTable);
 
         gtk_table_attach(GTK_TABLE(mTable), sDLTable, 0, 1, 1, 4, 
             static_cast<GtkAttachOptions>(GTK_FILL | GTK_EXPAND),
@@ -445,7 +441,6 @@ nsInstallDlg::Show(int aDirection)
             GTK_FILL, GTK_FILL, 10, 10);
         gtk_signal_connect(GTK_OBJECT(dlProxyBtn), "clicked",
             GTK_SIGNAL_FUNC(ShowProxySettings), NULL);
-        }
 
         // vbox with two widgets packed in: label0 / progmeter0 (major)
         vbox = gtk_vbox_new(FALSE, 0);
@@ -494,6 +489,17 @@ nsInstallDlg::Show(int aDirection)
         gtk_widget_show(mTable);
     }
 
+    int bCus = 
+        (gCtx->opt->mSetupType == (gCtx->sdlg->GetNumSetupTypes() - 1));
+    nsComponentList *comps = 
+        gCtx->sdlg->GetSelectedSetupType()->GetComponents(); 
+
+    if (!nsXIEngine::ExistAllXPIs(bCus, comps, &totalComps))
+    {
+        bDownload = TRUE;
+        gtk_widget_show(sDLTable);
+    }
+
     // signal connect the buttons
     gCtx->backID = gtk_signal_connect(GTK_OBJECT(gCtx->back), "clicked",
                    GTK_SIGNAL_FUNC(nsInstallDlg::Back), gCtx->idlg);