- prevent saving WSPR files if "Save None" is selected

- fix 4m band default frequency at hound mode checking

- fix removing last audio .wav file on mode change

- added 70cm band FT8 frequency, frequency list reset in Configuration settings is needed to get it displayed in the list

- option for displaying frequency value in waterfall, "Freq" checkbox is added for control

- "Bars" checkbox is moved to controls widget of widegraph

- disable rig power on/off option if other than Hamlib CAT selected

- ignore UDP message client's 'TemporaryError' message for starting JTDX on Mac Big Sur operating system

- allow to enter 19-char directional CQ message into macro edit line in Configuration settings

- multiple code changes towards compatibility with Qt 5.15.1

- some changes to GCC10 support, Linux builds affected

- recovered source code Qt 5.5 compatibility to future WinXP & Vista JTDX builds

- INSTALL file is updated with disabling INDI support in hamlib

- ALLCALL7.TXT update as of 20201127, big cty as of November 12th 2020, LoTW list is updated

- translation updates