DT, focus on sync and iOS next (& a suggestion on sidebar)

[cgrunenberg]

@ngan

For sidebar, I am aware that keyboard navigation is a planned feature. I would like to add two more thoughts:
(1) Allow to jump from sidebar to the list pane or even consecutively to the preview pane by the tab key. I recall many DT2 users are looking forward to this key-driven jump. It is a legitimate, and logical, suggestion. When a user has located a group in the sidebar, it is natural that they want to drill into the group/s for further review. Some users may be comfortable to continue the drill within the sidebar, but some may want to use the list view to continue the process and then scroll within the content (in std view or widescreen view).

As soon as the sidebar supports keyboard navigation it will be also supported by Ctrl-Tab and Shift-Ctrl-Tab. These are the recommended shortcuts to switch the focus as Tab might e.g. be already used for other stuff, e.g. in rich text views.