qt: never disable HD status icon

Make the watch-only icon in the bottom bar enabled by default for a better user interface.
Currently, it's disabled by default with a 50% opacity which makes it hard to see the icon in dark mode.

src/qt/bitcoingui.cpp

@@ -1304,8 +1304,6 @@ void BitcoinGUI::setHDStatus(bool privkeyDisabled, int hdEnabled)
     labelWalletHDStatusIcon->setThemedPixmap(privkeyDisabled ? QStringLiteral(":/icons/eye") : hdEnabled ? QStringLiteral(":/icons/hd_enabled") : QStringLiteral(":/icons/hd_disabled"), STATUSBAR_ICONSIZE, STATUSBAR_ICONSIZE);
     labelWalletHDStatusIcon->setToolTip(privkeyDisabled ? tr("Private key <b>disabled</b>") : hdEnabled ? tr("HD key generation is <b>enabled</b>") : tr("HD key generation is <b>disabled</b>"));
     labelWalletHDStatusIcon->show();
-    // eventually disable the QLabel to set its opacity to 50%
-    labelWalletHDStatusIcon->setEnabled(hdEnabled);
 }
 
 void BitcoinGUI::setEncryptionStatus(int status)