Activate <ESC> escape button to close Search dialog, like many other Windows programs.
Having to manually mouse click the 'OK' button on the 'Acrobat has finished searching the document' dialog is cumbersome. Ditto for other Acrobat dialogs. Please activate the <ESC> key here to close the dialogs. It makes navigation much faster.
For me, the problem is with the final message "Adobe Acrobat has finished searching the document. No more matches were found." Yes, I'm always hitting <ESC> because that's what I do to exit the Search dialog prior to getting that message. Allowing <ESC> to exit the message box would make things easier for the user. I'm pretty sure older versions of Acrobat Reader operated this way. Please bring back <ESC> to exit the Search message box.