Search dialog in window managers where focus follows pointer

In PyCharm (and all the IntelliJ suite tools), the search dialog closes as soon as it loses focus.

This is a complete pain in window managers which are configured for focus to follow the mouse pointer (I use Xubuntu, but many Linux window managers offer this behaviour as an option)

It means that if my mouse pointer drifts outside the area of the search dialog even for a moment, the dialog closes. Given that the buttons are close to the bottom of the window, it takes rather mouse movements to actually click on the buttons without accidentally closing the dialog first!