Fix alternatives for applets

X-Plasma-Provides is a list of strings, not a single string

BUG: 429801
BUG: 429800

components/shellprivate/widgetexplorer/plasmaappletitemmodel.cpp

@@ -271,10 +271,16 @@ void PlasmaAppletItemModel::populateModel(const QStringList &whatChanged)
 
     auto filter = [this](const KPluginMetaData &plugin) -> bool {
 
-        const QString provides = plugin.value(QStringLiteral("X-Plasma-Provides"));
+        const QStringList provides = KPluginMetaData::readStringList(plugin.rawData(), QStringLiteral("X-Plasma-Provides"));
 
-        if (!m_provides.isEmpty() && !m_provides.contains(provides)) {
-            return false;
+        if (!m_provides.isEmpty()) {
+            const bool providesFulfilled = std::any_of(m_provides.cbegin(), m_provides.cend(), [&provides](const QString &p) {
+                return provides.contains(p);
+            });
+
+            if (!providesFulfilled) {
+                return false;
+            }
         }
 
         if (!plugin.isValid() || plugin.rawData().value(QStringLiteral("NoDisplay")).toBool() || plugin.category() == QLatin1String("Containments")) {