Percentage based on last-known snapshot size
* server: exposed last completed snapshot size in the API
* cli: added support for progress indicator (percentage based on last-known snapshot size)
* htmlui: added progress indicator in the UI (percentage based on last-known snapshot size)
- added ability to make new snapshots from the UI
- added directory picker
- hide/show macOS dock icon automatically
- fixed copy/paste on Mac (apparently if you don't have 'Edit' menu
in your app, copy/paste and many other shortcut keys simply don't
work)
- added smart time formatting ("X minutes ago", etc.) in lists
using 'moment' library
- added progress information to snapshots
This is enabled by `kopia server --ui` and can be viewed in a browser
at http://localhost:51515/
Right now it can only list snapshots and policies (barely).
