fix: Wallet storage path creation broken (#49)

src/libwalletqt/WalletManager.h

@@ -2,6 +2,7 @@
 #define WALLETMANAGER_H
 
 #include <QObject>
+#include <QUrl>
 #include <wallet/wallet2_api.h>
 
 class Wallet;
@@ -88,6 +89,10 @@ public:
     // QML JS engine doesn't support unsigned integers
     Q_INVOKABLE QString maximumAllowedAmountAsSting() const;
 
+    // QML missing such functionality, implementing these helpers here
+    Q_INVOKABLE QString urlToLocalPath(const QUrl &url) const;
+    Q_INVOKABLE QUrl localPathToUrl(const QString &path) const;
+
     void setLogLevel(int logLevel);
 
 signals: