switch back to json lohman - qtjson in new branch for more testing

src/sendtab.cpp

@@ -8,6 +8,8 @@
 #include "controller.h"
 #include "recurring.h"
 
+using json = nlohmann::json;
+
 
 void MainWindow::setupSendTab() {
     // Create the validator for send to/amount fields