Fix: The viewport stops working when the program is minimized.

[rustbasic]

Fix: The viewport stops working when the program is minimized.

Issue :

The viewport stops working when the program is minimized.

• Related #3985
• Closes #3972
• Closes #4772
• Related #4832

Solution :

When request_redraw() is performed in Minimized state, the occasional screen tearing phenomenon has disappeared. ( Probably expected to be the effect of #4814 )

To address the issue of the Immediate Viewport not updating in Minimized state, we can call request_redraw().