Bugfix and Optimization

Aug 2021 - 1.8.4

• Bugfix: In some situations callsigns were always shown as to be worked. (Closes #345)
• Bugfix: Double click on DXCC widget was not sending the DXCC QSOs to the search widget.
• Bugfix: Queued LoTW were not properly selected for upload. (Closes #354) (TNX EA5WA)
• Improvement: KLog start is optimized.