add "surroundings" pane

[jtorjo]

this should pretty much show logs related to the existing log. For instance, say the log is called "MyApp.log" If there are logs like "MyApp.24-19-2016.log", or like "MyApp.log.1" and such, show them.

This should be a nice tree view, and show the closest files first (like I said above), then if there are other .log files, show those, then go to parent and show whatever I can find from there.

then, show the most recent files (sorted by name -> how close related they are to the first file)