Michael Eden authored Jun 26, 2018 and Albert Astals Cid committed Jun 26, 2018

Summary:
This exposes the Okular's functionality of changing the document's colors
through its d-bus interface. This is mainly useful for scripting Okular to
switch to a 'day mode' or 'night mode'.

[Example] Switching themes of two applications with one hotkey:

{F5905771}

Reviewers: #okular, aacid

Reviewed By: #okular, aacid

Subscribers: okular-devel

Tags: #okular

Differential Revision: https://phabricator.kde.org/D13471