qml: Add pending icon

The pending icon will be used to show the status of transactions

Author: johnny9

qml/bitcoin_qml.qrc

@@ -107,6 +107,7 @@
         <file alias="network-dark">res/icons/network-dark.png</file>
         <file alias="network-light">res/icons/network-light.png</file>
         <file alias="plus">res/icons/plus.png</file>
+        <file alias="pending">res/icons/pending.png</file>
         <file alias="shutdown">res/icons/shutdown.png</file>
         <file alias="singlesig-wallet">res/icons/singlesig-wallet.png</file>
         <file alias="storage-dark">res/icons/storage-dark.png</file>

qml/imageprovider.cpp

@@ -132,6 +132,11 @@ QPixmap ImageProvider::requestPixmap(const QString& id, QSize* size, const QSize
         return QIcon(":/icons/network-light").pixmap(requested_size);
     }
 
+    if (id == "pending") {
+        *size = requested_size;
+        return QIcon(":/icons/pending").pixmap(requested_size);
+    }
+
     if (id == "shutdown") {
         *size = requested_size;
         return QIcon(":/icons/shutdown").pixmap(requested_size);