Fixed disabling tabs in options dialog when category matches search

When the category title matches with the search keyword, we shouldn't
disable any of the tabs in this category. For example the only page in
the Locator category was disabled, because the page itself did not have
'Locator' as keyword.

Reviewed-by: con

src/plugins/coreplugin/dialogs/settingsdialog.cpp

@@ -382,6 +382,7 @@ void SettingsDialog::updateEnabledTabs(Category *category, const QString &search
     for (int i = 0; i < category->pages.size(); ++i) {
         const IOptionsPage *page = category->pages.at(i);
         const bool enabled = searchText.isEmpty()
+                             || page->category().contains(searchText, Qt::CaseInsensitive)
                              || page->displayName().contains(searchText, Qt::CaseInsensitive)
                              || page->matches(searchText);
         category->tabWidget->setTabEnabled(i, enabled);