* [loviewer] Improved support for presentation document type
* [loviewer] Added keyboard shortcuts.
* [loviewer] Added an image provider for slides thumbnails, sync'd with RenderEngine
* [loviewer] Conditional layout for the presentation view: use a bottom edge or a sidebar to show the list of slides
* [loviewer] Moved zoom controls into a separate page head
* Updated translation template.
Approved by Ubuntu Phone Apps Jenkins Bot.