Can't duplicate file since Version 8.5.7 (39535) on MacOS

[daimaire]

Since Version 8.5.7 (39535) on MacOS, when we try to duplicate a file, it gives as usual a name xxx (yyyy-mm-dd hh:ii:ss).ext . Can't valid it.

It seems that ":" is not accepted anymore in filename.

[connerat]

+1

[dkocher]

Regression from #14264.

[AliveDevil]

Might want to change the template, as ":" might be invalid on macOS and Windows: docs