Merge remote-tracking branch 'upstream/master'

Conflicts:
	src/qt/overviewpage.cpp
	src/qt/transactiondesc.cpp

src/qt/bitcoinunits.h

@@ -74,6 +74,8 @@ public:
     static QList<Unit> availableUnits();
     //! Is unit ID valid?
     static bool valid(int unit);
+    //! Identifier, e.g. for image names
+    static QString id(int unit);
     //! Short name
     static QString name(int unit);
     //! Longer description
@@ -93,6 +95,8 @@ public:
     static QString formatHtmlWithUnit(int unit, qint64 amount, bool plussign=false, SeparatorStyle separators=separatorStandard);
     //! Parse string to coin amount
     static bool parse(int unit, const QString &value, qint64 *val_out);
+    //! Gets title for amount column including current display unit if optionsModel reference available */
+    static QString getAmountColumnTitle(int unit);
     ///@}
 
     //! @name AbstractListModel implementation