Bug: org-noter--other-frames detects tooltip frame from pdf-tools

[dominiksta]

I have set org-noter-always-create-frame and org-noter-kill-frame-at-session-end to nil.

Despite that, when I want to close an org noter session shortly after opening it, it tries to delete the frame, causing an error and aborting before deleting the doc buffer and leaving org-noters frame-title-format in place.

This seems to happen because pdf-tools displays a tooltip on startup, which is erroneously detected by org-noter--other-frames.