I know I'm quite late for the party here, but having the very same need and trying to avoid mouse commands I've wrote a new plugin to that, take a look and give it a try, anything please feel free to ping me =)
I tested the solution proposed by Albert Català, but it causes an error when a popup window appears, with the 'Quick Switch Projects' command for example.
So here is my modified version to avoid errors :
import sublime
import sublime_plugin
class LinkWithEditor(sublime_plugin.EventListener):
def on_activated(self, view):
if view.window() is not None:
view.window().run_command('reveal_in_side_bar')