Adding "Save path" column

### Problem

When changing "Save path" for torrents with the same "Save path"

* it's helpful to be able to select all those torrents (so that one "Set location" operation move multiple torrents)
* without a "Save path" column the torrent path is read from the "General" tab which show the "Save path" for one torrent at a time (rather than all torrents visible in the list) which is less efficient
* it's helpful to sort the torrent list by save path


### Solution

Add a "Save path" column in the "Transfers" tab


### Same path as General > Information

It's the same path as in "General > Information" (called "properties" in the code) because it

* is consistent
* reduce duplication in save path parsing which is beneficial if the parsing is changed because it can be changed in one place (rather than more than one place)


### Test

This is tested by me since the commit date


### Merge conflict

If there's a merge conflict (because of a change between the commit and merge) request that I resolve it because

* it's best if the author rather than committer resolve a merge conflict
* because there can be different opinions about hot to resolve it


### Merge status

The commit should be merged because

* it's tested (described in the topic "Test")
* the idea is approved in this thread