Can't close popup window

Note, current bug is reproduced in multi-process mode

1. Start neptune with  "-c am-config-lucee.yaml --force-multi-process"
2. Open Sheets-app -> Popups -> ListView Popup
3. Try to close popup by clicking on cross

Expected result: popup closed

Actual result: popup doesn't close

Also this bug can be reproduced under "neptune" theme too.

1. Start neptune with  "--force-multi-process"
2. Open Sheets-app -> Popups -> ListView Popup
3. Try to close popup by clicking in area