GUI: Enable palette change adaptation on all platforms

src/qt/bitcoingui.cpp

@@ -1173,14 +1173,12 @@ void BitcoinGUI::message(const QString& title, QString message, unsigned int sty
 
 void BitcoinGUI::changeEvent(QEvent *e)
 {
-#ifdef Q_OS_MACOS
     if (e->type() == QEvent::PaletteChange) {
         overviewAction->setIcon(platformStyle->SingleColorIcon(QStringLiteral(":/icons/overview")));
         sendCoinsAction->setIcon(platformStyle->SingleColorIcon(QStringLiteral(":/icons/send")));
         receiveCoinsAction->setIcon(platformStyle->SingleColorIcon(QStringLiteral(":/icons/receiving_addresses")));
         historyAction->setIcon(platformStyle->SingleColorIcon(QStringLiteral(":/icons/history")));
     }
-#endif
 
     QMainWindow::changeEvent(e);
 
@@ -1511,14 +1509,12 @@ void UnitDisplayStatusBarControl::mousePressEvent(QMouseEvent *event)
 
 void UnitDisplayStatusBarControl::changeEvent(QEvent* e)
 {
-#ifdef Q_OS_MACOS
     if (e->type() == QEvent::PaletteChange) {
         QString style = QString("QLabel { color : %1 }").arg(m_platform_style->SingleColor().name());
         if (style != styleSheet()) {
             setStyleSheet(style);
         }
     }
-#endif
 }
 
 /** Creates context menu, its actions, and wires up all the relevant signals for mouse events. */

src/qt/coincontroldialog.cpp

@@ -564,11 +564,9 @@ void CoinControlDialog::updateLabels(CCoinControl& m_coin_control, WalletModel *
 
 void CoinControlDialog::changeEvent(QEvent* e)
 {
-#ifdef Q_OS_MACOS
     if (e->type() == QEvent::PaletteChange) {
         updateView();
     }
-#endif
 }
 
 void CoinControlDialog::updateView()

src/qt/guiutil.cpp

@@ -809,11 +809,9 @@ void ThemedLabel::setThemedPixmap(const QString& image_filename, int width, int
 
 void ThemedLabel::changeEvent(QEvent* e)
 {
-#ifdef Q_OS_MACOS
     if (e->type() == QEvent::PaletteChange) {
         updateThemedPixmap();
     }
-#endif
     QLabel::changeEvent(e);
 }
 

src/qt/overviewpage.cpp

@@ -297,13 +297,11 @@ void OverviewPage::setWalletModel(WalletModel *model)
 
 void OverviewPage::changeEvent(QEvent* e)
 {
-#ifdef Q_OS_MACOS
     if (e->type() == QEvent::PaletteChange) {
         QIcon icon = m_platform_style->SingleColorIcon(QStringLiteral(":/icons/warning"));
         ui->labelTransactionsStatus->setIcon(icon);
         ui->labelWalletStatus->setIcon(icon);
     }
-#endif
 }
 
 void OverviewPage::updateDisplayUnit()

src/qt/rpcconsole.cpp

@@ -882,7 +882,6 @@ void RPCConsole::keyPressEvent(QKeyEvent *event)
 
 void RPCConsole::changeEvent(QEvent* e)
 {
-#ifdef Q_OS_MACOS
     if (e->type() == QEvent::PaletteChange) {
         ui->clearButton->setIcon(platformStyle->SingleColorIcon(QStringLiteral(":/icons/remove")));
         ui->fontBiggerButton->setIcon(platformStyle->SingleColorIcon(QStringLiteral(":/icons/fontbigger")));
@@ -896,7 +895,6 @@ void RPCConsole::changeEvent(QEvent* e)
                 platformStyle->SingleColorImage(ICON_MAPPING[i].source).scaled(QSize(consoleFontSize * 2, consoleFontSize * 2), Qt::IgnoreAspectRatio, Qt::SmoothTransformation));
         }
     }
-#endif
 }
 
 void RPCConsole::message(int category, const QString &message, bool html)

src/qt/sendcoinsentry.cpp

@@ -238,7 +238,6 @@ void SendCoinsEntry::updateDisplayUnit()
 
 void SendCoinsEntry::changeEvent(QEvent* e)
 {
-#ifdef Q_OS_MACOS
     if (e->type() == QEvent::PaletteChange) {
         ui->addressBookButton->setIcon(platformStyle->SingleColorIcon(QStringLiteral(":/icons/address-book")));
         ui->pasteButton->setIcon(platformStyle->SingleColorIcon(QStringLiteral(":/icons/editpaste")));
@@ -246,7 +245,6 @@ void SendCoinsEntry::changeEvent(QEvent* e)
         ui->deleteButton_is->setIcon(platformStyle->SingleColorIcon(QStringLiteral(":/icons/remove")));
         ui->deleteButton_s->setIcon(platformStyle->SingleColorIcon(QStringLiteral(":/icons/remove")));
     }
-#endif
 }
 
 bool SendCoinsEntry::updateLabel(const QString &address)

src/qt/signverifymessagedialog.cpp

@@ -286,7 +286,6 @@ bool SignVerifyMessageDialog::eventFilter(QObject *object, QEvent *event)
 
 void SignVerifyMessageDialog::changeEvent(QEvent* e)
 {
-#ifdef Q_OS_MACOS
     if (e->type() == QEvent::PaletteChange) {
         ui->addressBookButton_SM->setIcon(platformStyle->SingleColorIcon(QStringLiteral(":/icons/address-book")));
         ui->pasteButton_SM->setIcon(platformStyle->SingleColorIcon(QStringLiteral(":/icons/editpaste")));
@@ -297,5 +296,4 @@ void SignVerifyMessageDialog::changeEvent(QEvent* e)
         ui->verifyMessageButton_VM->setIcon(platformStyle->SingleColorIcon(QStringLiteral(":/icons/transaction_0")));
         ui->clearButton_VM->setIcon(platformStyle->SingleColorIcon(QStringLiteral(":/icons/remove")));
     }
-#endif
 }

src/qt/transactionview.cpp

@@ -245,7 +245,6 @@ void TransactionView::setModel(WalletModel *_model)
 
 void TransactionView::changeEvent(QEvent* e)
 {
-#ifdef Q_OS_MACOS
     if (e->type() == QEvent::PaletteChange) {
         watchOnlyWidget->setItemIcon(
             TransactionFilterProxy::WatchOnlyFilter_Yes,
@@ -254,7 +253,6 @@ void TransactionView::changeEvent(QEvent* e)
             TransactionFilterProxy::WatchOnlyFilter_No,
             m_platform_style->SingleColorIcon(QStringLiteral(":/icons/eye_minus")));
     }
-#endif
 }
 
 void TransactionView::chooseDate(int idx)