Do size checking of icon sizes when loading system theme icons

src/core/iconloader.h

@@ -26,7 +26,7 @@
 class IconLoader {
  public:
   static void Init();
-  static QIcon Load(const QString &name, const int size = 0);
+  static QIcon Load(const QString &name, const int fixed_size = 0, const int min_size = 0, const int max_size = 0);
  private:
   explicit IconLoader() {}
   static bool system_icons_;