Improve History When Using Date Order in Repositories With Inserted Commits

In a repository where the parent of a commit is newer than the commit itself, Sourcetree does not display the parent of the commit properly when "date order" is selected (using topological order will display the repository correctly).

The reason for this is that the parent appears higher up in the commit history. However, the line that is shown suggests that the parent is yet to come. This is misleading. The line should stop with a particular marker or something (e.g. ending in an x).