add sendmany support

src/qt/qvalidatedlineedit.cpp

@@ -0,0 +1,37 @@
+#include "qvalidatedlineedit.h"
+
+QValidatedLineEdit::QValidatedLineEdit(QWidget *parent) :
+    QLineEdit(parent), valid(true)
+{
+    connect(this, SIGNAL(textChanged(QString)), this, SLOT(markValid()));
+}
+
+void QValidatedLineEdit::setValid(bool valid)
+{
+    if(valid == this->valid)
+    {
+        return;
+    }
+
+    if(valid)
+    {
+        setStyleSheet("");
+    }
+    else
+    {
+        setStyleSheet("background:#FF8080");
+    }
+    this->valid = valid;
+}
+
+void QValidatedLineEdit::focusInEvent(QFocusEvent *evt)
+{
+    // Clear invalid flag on focus
+    setValid(true);
+    QLineEdit::focusInEvent(evt);
+}
+
+void QValidatedLineEdit::markValid()
+{
+    setValid(true);
+}