Krzysztof Kurek authored Sep 23, 2019 and Dmitry Kazakov committed Sep 23, 2019

Bunch of misc commits that remove warnings about
deprecation in places where it doesn't affect code much.

https://invent.kde.org/kde/krita/merge_requests/150

Squashed commit of the following:

commit 10429761
Author: Krzysztof Kurek <krzysio.kurek@wp.pl>
Date:   Mon Sep 23 13:48:36 2019 +0000

    Remove a Qt5.13 function call

commit 232ac699
Author: Krzysztof Kurek <krzysio.kurek@pm.me>
Date:   Sat Sep 21 17:14:36 2019 +0200

    Remove a CXX specific flag from other targets

commit 6b71a3cc
Author: Krzysztof Kurek <krzysio.kurek@pm.me>
Date:   Sat Sep 21 17:12:34 2019 +0200

    Even more deprecation removal work

commit 9c4972ad
Author: Krzysztof Kurek <krzysio.kurek@pm.me>
Date:   Sat Sep 21 14:10:44 2019 +0200

    Revert some const-ref changes

    Also explicitly mark KisOptionInfo's copy-ctor as being present

commit f13ff926
Author: Krzysztof Kurek <krzysio.kurek@pm.me>
Date:   Fri Sep 20 01:15:47 2019 +0200

    A bunch more deprecation fixes

    Hopefully it all works... I don't have a second screen to test it thorough.

commit 95c1ee12
Author: Krzysztof Kurek <krzysio.kurek@pm.me>
Date:   Thu Sep 19 20:32:47 2019 +0200

    Get rid of a few implicit deprecation warnings

    Deleted some superfluous constructor definitions,
    explicitly declared operator= of SvgGraphicsContext as default but only for private usage.

commit 35d2f530
Author: Krzysztof Kurek <krzysio.kurek@pm.me>
Date:   Thu Sep 19 20:30:35 2019 +0200

    Simplify KisSwatch class

    Removes a warning about implicit deprecation