refactor: use C++11 default initializers

src/qt/overviewpage.cpp

@@ -35,8 +35,7 @@ class TxViewDelegate : public QAbstractItemDelegate
     Q_OBJECT
 public:
     explicit TxViewDelegate(const PlatformStyle* _platformStyle, QObject* parent = nullptr)
-        : QAbstractItemDelegate(parent), unit(BitcoinUnit::BTC),
-          platformStyle(_platformStyle)
+        : QAbstractItemDelegate(parent), platformStyle(_platformStyle)
     {
         connect(this, &TxViewDelegate::width_changed, this, &TxViewDelegate::sizeHintChanged);
     }
@@ -125,7 +124,7 @@ public:
         return {DECORATION_SIZE + 8 + minimum_text_width, DECORATION_SIZE};
     }
 
-    BitcoinUnit unit;
+    BitcoinUnit unit{BitcoinUnit::BTC};
 
 Q_SIGNALS:
     //! An intermediate signal for emitting from the `paint() const` member function.