Strip leading/trailing whitespace from wallet birthdays

src/firsttimewizard.cpp

@@ -649,7 +649,7 @@ RestoreSeedPage::RestoreSeedPage(FirstTimeWizard *parent) : QWizardPage(parent)
 
 bool RestoreSeedPage::validatePage() {
     // 1. Validate that we do have 24 words
-    QString seed = form.txtSeed->toPlainText().replace(QRegExp("[ \n\r\t]+"), " ");
+    QString seed = form.txtSeed->toPlainText().replace(QRegExp("[ \n\r\t]+"), " "); //TODO: use .simplified()
     auto seedLength = seed.trimmed().split(" ").length();
     qDebug() << __func__ << ": seed length=" << seedLength;
     if (seedLength != 24) {
@@ -662,11 +662,12 @@ bool RestoreSeedPage::validatePage() {
     // 2. Validate birthday
     QString birthday_str = form.txtBirthday->text();
     bool ok;
-    qint64 birthday = birthday_str.toUInt(&ok);
+    // simplified() Returns a string that has whitespace removed from the start and the end, and that has each sequence of internal whitespace replaced with a single space.
+    qint64 birthday = birthday_str.simplified().toUInt(&ok);
     if (!ok) {
         qDebug() << __func__ << ": Failed to parse wallet birthday=" << birthday_str;
         QMessageBox::warning(this, tr("Failed to parse wallet birthday"), 
-            tr("Couldn't understand wallet birthday. This should be a block height from where to rescan the wallet. You can leave it as '0' if you don't know what it should be."),
+            tr("Couldn't understand wallet birthday. This should be a block height from where to rescan the wallet. You can leave the default if you don't know what it should be."),
             QMessageBox::Ok);
         return false;
     }