static_assert in C++11 requires a second argument, single-arg static_assert
is C++17.

We only use boost algorithm now, but all references to shared_ptr, bind
etc. have been replaced with C++11 equivalents.

This also includes lots of boost::shared_ptr -> std::shared_ptr
changes, but there are still places where boost is used. We should
definitely do a second round of clean up later on.

KDSignalBlocker has been upstreamed to Qt as QSignalBlocker since
Qt 5.3, so the Qt class instead.

This also unifies the "archive forced" logic in a single
place and removes some kdtools complication.

Moving the heavy init stuff like keycache init below
the uniqueservice creation saves resources and fixes ghosting systray
icons when multiple calls are done and forwarded to the
unique instance of the application.

The speed up on Windows is noticable (> 200ms).

This fixes paperkey lookup on Windows where it is not placed
in PATH but packaged together with Kleopatra and installed into
the same directory.

This action does not make much sense and behaves confusingly
in that you would have to check it each time. Better remove it.

If there are no outputs the options "Ok" and "Cancel" don't
make sense to have both. The ButtonBox accept is now also
properly forwarded.

We finally have a solution for progress that works with Qt
data types and how kleopatra passes data to GnuPG. This
requires GpgME 1.7.0 and GnuPG 2.1.15 to work.

This also simplifies progress handling for that case as we
can finally use current and total values and GnuPG no longer
overflows in progress messages since 2.1.14.

BUG: 365931

Otherwise the wizard's title is duplicated in a very ugly
way on Windows 10 and does not look more native in any way imo.

With the switch to a gridlayout removing takes a bit more effort
as we manually have to update the positions of the items below
the removed line.
This also fixes a problem that removed items were not deleted.

As KeySelectionCombo does a delayed init setCurrentKey runs
into an unpopulated model as it was called before init.

This adds general support to add symmetric pgp encryption
to other operations like with signing or encrypting to other
recpients and enables the according checkbox in the
new SingnEncryptFilesWidget.

Needs GpgME 1.7.0 to work properly. Otherwise the feature is
not shown in the UI.

This could cause crashes on Application shutdown.

Typo caused setEncrypt never to be set to false.

Show warning again for opaque archive signatures and don't
show warning about own encryption key when encryption is not selected.

The Layout is now more in line with the mockup from T2348. This
also adds a placeholder for symetric encryption that is currently
disabled as its not yet functional.

Using QWidget as a base was a relic from the past where the
lineedit was a widget with extra buttons and labels.

This again respects the difference in archive names between
OpenPGP and CMS Archives,..

To avoid linking ArchiveDefinition into kleopatras config KCM we
parse libkleopatrarc directly in the KCM and just work with
Label and Id values from it.

This moves back the certificatecombo code into the
certificateselectionline and removes it as an extra class.