Fix viewport not working when minimized

[rustbasic]

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

Fix: Logically, the weird parts have been normalized.

Issue :

The viewport stops working when the program is minimized.

• Related eframe: Graphical glitches when window has been minimized #3321
• Related eframe: don't call App::update on minimized windows #3877
• Related Fix high CPU usage on Windows when app is minimized #3985
• Closes When the program is minimized, the viewport stops working. #3972
• Closes On Linux, the window doesn't close unless it's unminimized #4772
• Related Fix: The viewport stops working when the program is minimized.  #4832
• Closes Fix: The viewport stops working when the program is minimized.  #4892

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().