User Interface: Better smart phone support (small screens)

[dereks]

This is a request for RFM to be friendlier on smart phones, with a user interface more similar to Dropbox or Google Drive Android apps.

The basic UI design is that the left-side tree will "auto-hide" if using a narrow phone screen. But it can be un-hidden by clicking a small button on the upper-left. This can be seen in Android's "Material Design" guidelines. This will let the user to toggle the narrow screen between tree-view and directory view. This will be some user-interface javascript and should not affect the server.

The second part of this is making the tree widget touchscreen friendly. JsTree has this feature built in, so I'd like to complete my work on JsTree first. (It is ~80% done.)

Finally, JsTree supports a feature of auto-selecting all child elements when a directory is selected. This allows the user to easily move sub-directories to another parent folder (instead of just files). I need this feature, as it allows users to organize the directory hierarchy. But this needs some extra support on the server PHP, so that the "move" action will support a directory move. So I need to get that working server-side first.

Thanks!