Contest Logging Dupe Checking Bugfix/Improvement

[DH5DAX]

Fixes https://github.com/magicbug/Cloudlog/issues/3000

• moved checkWorkedBefore lookup from keyup to blur events so lookup happens after TAB press or click in other field similar to behaviour of N1MM Logger+
• added second green badge if station is okay to work ("Go Work Them")

Tested in ARRL DX Phone Contest and produced no dupes any longer