Bugfix and backport for slower distros

Aug 2021 - 1.8.3

• Added some backport code so systems without Qt 5.15.2 can compile and use KLog.
• Bugfix: Selecting File->Export to ADIF was not showing all the possible QSOs to be exported.

Aug 2021 - 1.8.2

• Bugfix: Updated the openSSL libraries for Windows users that was causing TLS errors on some connections. (Closes #342)
• Bugfix: Spanish typo (TNX (EA5WA) (Closes #341)
• Bugfix: Statistics were showing wrong numbers on DXCC/Grid per band (Closes #344)