click_label() now detects clickable parent containers and uses
send_event(lv.EVENT.CLICKED) instead of simulate_click() for more
reliable UI test interactions.
This fixes sporadic failures in test_graphical_imu_calibration_ui_bug.py
where clicking "Check IMU Calibration" would sometimes fail because
simulate_click() wasn't reliably triggering the click event on the
parent container.
- Add use_send_event parameter to click_label() (default: True)
- Detect clickable parent containers and send events directly to them
- Verified with 15 consecutive test runs (100% pass rate)
Thomas Farstrike