Write support for tx notes

Support still needs adding for displaying them in the history,
but at least they're saved in the cache now, and not ignored.

main.qml

@@ -52,6 +52,7 @@ ApplicationWindow {
     property alias persistentSettings : persistentSettings
     property var currentWallet;
     property var transaction;
+    property var transactionDescription;
     property alias password : passwordDialog.password
     property int splashCounter: 0
     property bool isNewWallet: false
@@ -346,13 +347,14 @@ ApplicationWindow {
 
 
     // called on "transfer"
-    function handlePayment(address, paymentId, amount, mixinCount, priority) {
+    function handlePayment(address, paymentId, amount, mixinCount, priority, description) {
         console.log("Creating transaction: ")
         console.log("\taddress: ", address,
                     ", payment_id: ", paymentId,
                     ", amount: ", amount,
                     ", mixins: ", mixinCount,
-                    ", priority: ", priority);
+                    ", priority: ", priority,
+                    ", description: ", description);
 
 
         // validate amount;
@@ -398,6 +400,8 @@ ApplicationWindow {
             console.log("Transaction created, amount: " + walletManager.displayAmount(transaction.amount)
                     + ", fee: " + walletManager.displayAmount(transaction.fee));
 
+            transactionDescription = description;
+
             // here we show confirmation popup;
 
             transactionConfirmationPopup.title = qsTr("Confirmation") + translationManager.emptyString
@@ -407,6 +411,7 @@ ApplicationWindow {
                         + qsTr("\n\nAmount: ") + walletManager.displayAmount(transaction.amount)
                         + qsTr("\nFee: ") + walletManager.displayAmount(transaction.fee)
                         + qsTr("\n\nMixin: ") + mixinCount
+                        + qsTr("\n\nDescription: ") + description
                         + translationManager.emptyString
             transactionConfirmationPopup.icon = StandardIcon.Question
             transactionConfirmationPopup.open()
@@ -416,6 +421,16 @@ ApplicationWindow {
 
     // called after user confirms transaction
     function handleTransactionConfirmed() {
+        // grab transaction.txid before commit, since it clears it.
+        // we actually need to copy it, because QML will incredibly
+        // call the function multiple times when the variable is used
+        // after commit, where it returns another result...
+        // Of course, this loop is also calling the function multiple
+        // times, but at least with the same result.
+        var txid = [], txid_org = transaction.txid, txid_text = ""
+        for (var i = 0; i < txid_org.length; ++i)
+          txid[i] = txid_org[i]
+
         if (!transaction.commit()) {
             console.log("Error committing transaction: " + transaction.errorString);
             informationPopup.title = qsTr("Error") + translationManager.emptyString
@@ -423,8 +438,17 @@ ApplicationWindow {
             informationPopup.icon  = StandardIcon.Critical
         } else {
             informationPopup.title = qsTr("Information") + translationManager.emptyString
-            informationPopup.text  = qsTr("Money sent successfully") + translationManager.emptyString
+            for (var i = 0; i < txid.length; ++i) {
+                if (txid_text.length > 0)
+                    txid_text += ", "
+                txid_text += txid[i]
+            }
+            informationPopup.text  = qsTr("Money sent successfully: %1 transaction(s) ").arg(txid.length) + txid_text + translationManager.emptyString
             informationPopup.icon  = StandardIcon.Information
+            if (transactionDescription.length > 0) {
+                for (var i = 0; i < txid.length; ++i)
+                  currentWallet.setUserNote(txid[i], transactionDescription);
+            }
         }
         informationPopup.onCloseCallback = null
         informationPopup.open()