[Qt] use GUIUtil::setClipboard() where possible

src/qt/guiutil.cpp

@@ -221,10 +221,8 @@ void copyEntryData(QAbstractItemView *view, int column, int role)
 
     if(!selection.isEmpty())
     {
-        // Copy first item (global clipboard)
-        QApplication::clipboard()->setText(selection.at(0).data(role).toString(), QClipboard::Clipboard);
-        // Copy first item (global mouse selection for e.g. X11 - NOP on Windows)
-        QApplication::clipboard()->setText(selection.at(0).data(role).toString(), QClipboard::Selection);
+        // Copy first item
+        setClipboard(selection.at(0).data(role).toString());
     }
 }
 

src/qt/receiverequestdialog.cpp

@@ -11,11 +11,11 @@
 #include "optionsmodel.h"
 #include "walletmodel.h"
 
-#include <QPixmap>
 #include <QClipboard>
-#include <QMouseEvent>
 #include <QDrag>
 #include <QMimeData>
+#include <QMouseEvent>
+#include <QPixmap>
 #if QT_VERSION < 0x050000
 #include <QUrl>
 #endif
@@ -177,13 +177,10 @@ void ReceiveRequestDialog::update()
 
 void ReceiveRequestDialog::on_btnCopyURI_clicked()
 {
-    QString uri = GUIUtil::formatBitcoinURI(info);
-    QApplication::clipboard()->setText(uri, QClipboard::Clipboard);
-    QApplication::clipboard()->setText(uri, QClipboard::Selection);
+    GUIUtil::setClipboard(GUIUtil::formatBitcoinURI(info));
 }
 
 void ReceiveRequestDialog::on_btnCopyAddress_clicked()
 {
-    QApplication::clipboard()->setText(info.address, QClipboard::Clipboard);
-    QApplication::clipboard()->setText(info.address, QClipboard::Selection);
+    GUIUtil::setClipboard(info.address);
 }

src/qt/signverifymessagedialog.cpp

@@ -25,8 +25,7 @@ SignVerifyMessageDialog::SignVerifyMessageDialog(QWidget *parent) :
 {
     ui->setupUi(this);
 
-#if (QT_VERSION >= 0x040700)
-    /* Do not move this to the XML file, Qt before 4.7 will choke on it */
+#if QT_VERSION >= 0x040700
     ui->addressIn_SM->setPlaceholderText(tr("Enter a Bitcoin address (e.g. 1NS17iag9jJgTHD1VXjvLCEnZuQ3rJDE9L)"));
     ui->signatureOut_SM->setPlaceholderText(tr("Click \"Sign Message\" to generate signature"));
 
@@ -73,7 +72,6 @@ void SignVerifyMessageDialog::setAddress_VM(const QString &address)
 void SignVerifyMessageDialog::showTab_SM(bool fShow)
 {
     ui->tabWidget->setCurrentIndex(0);
-
     if (fShow)
         this->show();
 }
@@ -164,7 +162,7 @@ void SignVerifyMessageDialog::on_signMessageButton_SM_clicked()
 
 void SignVerifyMessageDialog::on_copySignatureButton_SM_clicked()
 {
-    QApplication::clipboard()->setText(ui->signatureOut_SM->text());
+    GUIUtil::setClipboard(ui->signatureOut_SM->text());
 }
 
 void SignVerifyMessageDialog::on_clearButton_SM_clicked()