Feature Request: Use primary selection instead of clipboard

[krayon]

I personally don't use the clipboard all that often but DO use the primary selection quite a bit. An option to choose between them would be nice.

I originally patched v1.0.1 to offer this and have now done so with current master. I have NEVER done any QT development however so it was a copy/paste/search/replace job. I am therefore not creating a PR but you can see it on my branch (f-clipsel) here:
https://github.com/krayon/QtPass/tree/f-clipsel

[krayon]

I realise now that it should be disabled in other OS', so will require a platform check in ConfigDialog::on_comboBoxClipboard_activated and MainWindow::copyTextToClipboard (at least).

[annejan]

This looks like a great feature.

I would like to try what it does on other OS' and if it doesn't break anything (which I think it won't since it's nicely abstracted away by Qt) keep the change as-is.

[annejan]

I took the Windows build from https://ci.appveyor.com/project/annejan/qtpass/build/1.1.531

Installed on a Windows 7 VM from modern.ie

Primary selection does nothing on Windows (also doesn't break anything) so option should just be disabled. Also found some other UI/UX tweaks needed in Settings screen.

Primary selection works like a charm on macOS and Arch+KDE.

[annejan]

Implementing a: QClipboard::supportsSelection() check 👍

[annejan]

The only thing really missing from your PR was the handling of (auto) clearing of selection (switch) clipboard.

[krayon]

Wow, quick work, thanks @annejan :D

I think a translation is still needed for other languages (building outputs "Generated 167 translation(s) (166 finished and 1 unfinished)") - sadly I only speak English.