Add "Show Rulers" checkbox to "Grid and Guides" docker
Summary: this is a patch for - Bug 361783 - JJ:Add "Show Rulers" checkbox to "Grid and Guides" docker .
Test Plan: First created a showRulers checkbox and then connected it to the view rulers checkbox in menu
Reviewers: Krita, dkazakov
Reviewed By: Krita, dkazakov
Subscribers: dkazakov, rempt, woltherav, Krita
Tags: Krita
Differential Revision: https://phabricator.kde.org/D5740