When trying the gallery example app in flutter_web I noticed that clicking away from a focused text field does not cause it to lose focus.

It is standard behaviour on the web that when a text field is focused and the mouse is clicked on a blank space on the page the field is unfocused.

Steps to reproduce on Chrome browser with a mouse and keyboard (e.g. on a desktop):

1. Click on text field - Field is now in focus with cursor visible
2. Click outside of text field on a blank space (not another text field) - Text field is still in focus