Notes on QMake variables

We do not currently make use QMAKE_TARGET_COPYRIGHT the Qt documentation says:

Windows only. Specifies the copyright information for the project target; this is used where applicable for putting the copyright information in the application's properties. This is only utilized if the VERSION or RC_ICONS variable is set and the RC_FILE and RES_FILE variables are not set.

Given that we DO set VERSION and RC_ICON this might be relevant, OTOH although we do not explicitly set the RC_FILE and RES_FILE they may be generated for us - but that might be significant!

A note I trimmed from the project file:

"set the Windows binary icon, the proper .ico file should contains several layers of increasing sizes: 16, 24, 32, 48, 64, 128, 256 - as well as being used for the executable application file when it is displayed in the Windows explorer it is also used in some other places (installed applications in Windows settings/control panel)" -- slysven (talk) 22:37, 16 October 2020 (UTC)