- libtorrent 1.1 changes default piece priorty to 4 so changes to
the UIs are required. Some refactoring and improvements were made as well:
- A new 'Low' priority introduced that is values 1-3.
- 'Normal' priority is now value 4.
- Removed 'Highest' with the addition of 'Low' and 'High' is now values 5-7.
- Renamed 'Do not download' to 'Ignore' so it is more succinct.
- Moved file priority constant to ui.common.