Fix: Handling state.ime_enabled in multiple TextEdit and Chinese

[rustbasic]

Fix: Handling state.ime_enabled in multiple TextEdit.

• Related Improve IME support with new Event::Ime #4358
• Related IME for chinese #4436
• Related Handle the IME event first in TextEdit to fix some bugs #4794
• Related Fix: Ensures correct IME behavior when the text input area gains or loses focus. #4896
• Closes backspace fail after ime input #4908

Issues: When focus is moved elsewhere, you must set ime_enabled to 'false`, otherwise the IME will have problems when focus returns.

Issues: #4908 (Chinese)
Because there are differences in how Korean and Chinese are handled, ui.visuals().text_cursor.ime_preedit_finished is introduced.

For Chinese :

    ui.visuals_mut().text_cursor.ime_preedit_finished = true;