Better parent version filtering; handle old fabric :P

Signed-off-by: TheKodeToad <TheKodeToad@proton.me>

launcher/Filter.h

@@ -30,6 +30,16 @@ private:
     QString pattern;
 };
 
+class ExactIfPresentFilter: public Filter
+{
+   public:
+    ExactIfPresentFilter(const QString& pattern);
+    ~ExactIfPresentFilter() override = default;
+    bool accepts(const QString& value) override;
+   private:
+    QString pattern;
+};
+
 class RegexpFilter: public Filter
 {
 public: