Seems #2350 broke all context-menu copy actions for me on Windows, removing QClipboard::Selection from void copyEntryData() in guiutil.cpp solves this.
I'm already using Qt5, perhaps the problem lies here. Can a non Linux user confirm or verify my problem?
The Selection clipboard likely doesn't exist on windows.
QClipboard::Clipboard 0 indicates that data should be stored and retrieved from the global clipboard.
QClipboard::Selection 1 indicates that data should be stored and retrieved from the global mouse selection. Support for Selection is provided only on systems with a global mouse selection (e.g. X11).
I think we should copy to both clipboards.
I'll try that and create a patch later, if QClipboard::Clipboard | QClipboard::Selection does the job.