Ensure the right radio is selected when selective sync is picked

This got broken previously when trying to reconcile during a
cherry-pick. This also repairs the case when the theme tells us the
default is to not select anything (not that we're using this right now
but in case we'd like to brand this).

Signed-off-by: Kevin Ottens <kevin.ottens@nextcloud.com>

src/gui/wizard/owncloudadvancedsetuppage.cpp

@@ -149,6 +149,7 @@ void OwncloudAdvancedSetupPage::initializePage()
 
     if (Theme::instance()->wizardSelectiveSyncDefaultNothing()) {
         _selectiveSyncBlacklist = QStringList("/");
+        setRadioChecked(_ui.rSelectiveSync);
         QTimer::singleShot(0, this, &OwncloudAdvancedSetupPage::slotSelectiveSyncClicked);
     }
 
@@ -367,6 +368,9 @@ void OwncloudAdvancedSetupPage::slotSelectiveSyncClicked()
 
         if (updateBlacklist) {
             if (!_selectiveSyncBlacklist.isEmpty()) {
+                _ui.rSelectiveSync->blockSignals(true);
+                setRadioChecked(_ui.rSelectiveSync);
+                _ui.rSelectiveSync->blockSignals(false);
                 auto s = dlg->estimatedSize();
                 if (s > 0) {
                     _ui.lSelectiveSyncSizeLabel->setText(tr("(%1)").arg(Utility::octetsToString(s)));