Fix rss icon too large in rss settings dialog

Give a name to the rss icon (in .ui file)
Add helper function: Utils::Misc::largeIconSize()
Group functions under the same #ifdef

src/base/utils/misc.cpp

@@ -611,6 +611,19 @@ void Utils::Misc::openFolderSelect(const QString &absolutePath)
 #endif
 }
 
+QSize Utils::Misc::smallIconSize()
+{
+    // Get DPI scaled icon size (device-dependent), see QT source
+    int s = QApplication::style()->pixelMetric(QStyle::PM_SmallIconSize);
+    return QSize(s, s);
+}
+
+QSize Utils::Misc::largeIconSize()
+{
+    // Get DPI scaled icon size (device-dependent), see QT source
+    int s = QApplication::style()->pixelMetric(QStyle::PM_LargeIconSize);
+    return QSize(s, s);
+}
 #endif // DISABLE_GUI
 
 namespace
@@ -631,16 +644,6 @@ void Utils::Misc::msleep(unsigned long msecs)
     SleeperThread::msleep(msecs);
 }
 
-#ifndef DISABLE_GUI
-QSize Utils::Misc::smallIconSize()
-{
-    // Get DPI scaled icon size (device-dependent), see QT source
-    int s = QApplication::style()->pixelMetric(QStyle::PM_SmallIconSize);
-    return QSize(s, s);
-}
-
-#endif
-
 QString Utils::Misc::osName()
 {
     // static initialization for usage in signal handler

src/base/utils/misc.h

@@ -69,11 +69,6 @@ namespace Utils
 
         void shutdownComputer(const ShutdownDialogAction &action);
 
-#ifndef DISABLE_GUI
-        // Get screen center
-        QPoint screenCenter(QWidget *win);
-        QSize smallIconSize();
-#endif
         QString osName();
         QString boostVersionString();
         QString libtorrentVersionString();
@@ -107,6 +102,10 @@ namespace Utils
 #ifndef DISABLE_GUI
         void openPath(const QString& absolutePath);
         void openFolderSelect(const QString& absolutePath);
+
+        QPoint screenCenter(QWidget *win);
+        QSize smallIconSize();
+        QSize largeIconSize();
 #endif
 
 #ifdef Q_OS_WIN