Missing translation: Sort slide

[fkohrt]

The following code contains English words "right" and "left" and could be translated as well:

h5p-editor-course-presentation/scripts/cp-editor.js

Lines 274 to 275 in c6f9dfe

	$sortLeft: H5PEditor.$('<a href="#" aria-label="' + H5PEditor.t('H5PEditor.CoursePresentation', 'sortSlide', {':dir': 'left'}) + '" class="h5p-slidecontrols-button h5p-slidecontrols-button-sort-left"></a>'),
	$sortRight: H5PEditor.$('<a href="#" aria-label="' + H5PEditor.t('H5PEditor.CoursePresentation', 'sortSlide', {':dir': 'right'}) + '" class="h5p-slidecontrols-button h5p-slidecontrols-button-sort-right"></a>'),