Problem: If the last word you entered in the Gerrit search box is part of a Gerrit keyword (e.g., "merged"), you would be forced to manually modify the URL after hitting the "Enter" key, because a dropdown list with Gerrit keywords (ending with colons) would pop up.
Proposed solution: Add "No keyword" as the default option in the Gerrit search dropdown list. That way, if you really meant to search for the word "merged", you would not be forced to enter a random date after "mergedafter:" and then manually modify the URL.
