Add remmina remoteapp fallback

Author: crschnick

app/src/main/java/io/xpipe/app/rdp/RemminaRdpClient.java

@@ -24,6 +24,16 @@ private List<String> toStrip() {
     @Override
     public void launch(RdpLaunchConfig configuration) throws Exception {
         RdpConfig c = configuration.getConfig();
+
+        // Remmina does not support RemoteApps
+        if (c.get("remoteapplicationprogram").isPresent()) {
+            var freerdp = new FreeRdpClient();
+            if (freerdp.isAvailable()) {
+                freerdp.launch(configuration);
+                return;
+            }
+        }
+
         var l = new HashSet<>(c.getContent().keySet());
         toStrip().forEach(l::remove);
         if (l.size() == 2 && l.contains("username") && l.contains("full address")) {