@jetbrains Your current release of IntelliJ has broke the shift-shift open. It will not close the dialog after you select a file to open, then it puts it behind the open window. Forcing you to find and close it. Annoying.
We have related issues on YouTrack: https://youtrack.jetbrains.com/issue/IDEA-189398 …, https://youtrack.jetbrains.com/issue/IDEA-176584 …. It should be fixed in 2018.2. It's possible to disable Search Everywhere: https://youtrack.jetbrains.com/issue/IDEA-161094 …