add icons to "New..." and "Copy to clipboard" buttons

src/qt/bitcoin.qrc

@@ -21,6 +21,7 @@
         <file alias="receiving_addresses">res/icons/receive.png</file>
         <file alias="editpaste">res/icons/editpaste.png</file>
         <file alias="editcopy">res/icons/editcopy.png</file>
+        <file alias="add">res/icons/add.png</file>
     </qresource>
     <qresource prefix="/images">
         <file alias="about">res/images/about.png</file>

src/qt/bitcoingui.cpp

@@ -82,8 +82,10 @@ BitcoinGUI::BitcoinGUI(QWidget *parent):
     
     QPushButton *button_new = new QPushButton(tr("&New..."));
     button_new->setToolTip(tr("Create new receiving address"));
+    button_new->setIcon(QIcon(":/icons/add"));
     QPushButton *button_clipboard = new QPushButton(tr("&Copy to clipboard"));
     button_clipboard->setToolTip(tr("Copy current receiving address to the system clipboard"));
+    button_clipboard->setIcon(QIcon(":/icons/editcopy"));
     hbox_address->addWidget(button_new);
     hbox_address->addWidget(button_clipboard);