|When the FindBar is displayed, if you are in the Editor view, clicking the FindBar button in the Plug-ins toolbar changes the keyboard focus to the FindBar. Once the focus is on the FindBar, clicking the FindBar button in the Plug-ins toolbar again closes the FindBar. Thus, in order to close the FindBar when the focus is in the Editor view, you will need to click the FindBar button twice.
The above behavior allows you to move the focus to the FindBar drop-down list by assigning a keyboard shortcut to this plug-in command. In order to allow this focus movement by a shortcut key, the above behavior is specification.