qt: Change default size of intro frame

src/qt/intro.cpp

@@ -154,6 +154,7 @@ Intro::Intro(QWidget *parent, uint64_t blockchain_size, uint64_t chain_state_siz
         storageRequiresMsg.arg(requiredSpace) + " " +
         tr("The wallet will also be stored in this directory.")
     );
+    this->adjustSize();
     startThread();
 }