Merge branch 'feat-outputprovider' into dev

ajax/output/getEntityData.php

ajax/output/getMailData.php

ajax/output/getPreview.php

ajax/output/getTemplates.php

ajax/output/sendMail.php

bin/backend/controls/OutputDialog.css

bin/backend/controls/OutputDialog.html

bin/backend/controls/OutputDialog.js

bin/backend/controls/OutputMailEditor.css

bin/backend/controls/OutputMailEditor.html

bin/backend/controls/OutputMailEditor.js

bin/backend/controls/Panel.js

bin/backend/controls/settings/OutputTemplates.css

bin/backend/controls/settings/OutputTemplates.html

bin/backend/controls/settings/OutputTemplates.js

bin/output/backend/download.php

bin/output/backend/print.php

bin/output/backend/printStream.php

bin/output/frontend/download.php

composer.json