折叠按钮修改，转码页面优化

main.cpp

@@ -1,12 +1,14 @@
 #include "src/mainwindow/mainwindow.h"
 #include "ElaApplication.h"
 #include <QApplication>
+#include <QIcon>
 
 int main(int argc, char *argv[])
 {
     QApplication a(argc, argv);
+    a.setWindowIcon(QIcon(":resources/images/ChangeCode.png"));
     eApp->init();
     MainWindow w;
-    w.show();
+    w.showMaximized();
     return a.exec();
 }