[Qt] fix bitcoin: URI strings (spelling fixes)

src/qt/forms/sendcoinsentry.ui

@@ -154,7 +154,7 @@
     <item row="3" column="1">
      <widget class="QLabel" name="messageTextLabel">
       <property name="toolTip">
-       <string>A message that was attached to the Bitcoin URI which will be stored with the transaction for your reference. Note: This message will not be sent over the Bitcoin network.</string>
+       <string>A message that was attached to the bitcoin: URI which will be stored with the transaction for your reference. Note: This message will not be sent over the Bitcoin network.</string>
       </property>
       <property name="textFormat">
        <enum>Qt::PlainText</enum>

src/qt/guiutil.cpp

@@ -90,7 +90,7 @@ void setupAmountWidget(QLineEdit *widget, QWidget *parent)
 
 bool parseBitcoinURI(const QUrl &uri, SendCoinsRecipient *out)
 {
-    // return if URI is not valid or is no bitcoin URI
+    // return if URI is not valid or is no bitcoin: URI
     if(!uri.isValid() || uri.scheme() != QString("bitcoin"))
         return false;
 

src/qt/recentrequeststablemodel.h

@@ -53,7 +53,7 @@ private:
     Qt::SortOrder order;
 };
 
-/** Model for list of recently generated payment requests / bitcoin URIs.
+/** Model for list of recently generated payment requests / bitcoin: URIs.
  * Part of wallet model.
  */
 class RecentRequestsTableModel: public QAbstractTableModel