"activate" argument can work in Linux!

In file linux/**init**.py i found this information:
`def __init__(self, activate_browser):
# activate_browser is always true on Windows since you can't
# send keys to an inactive window programmatically. We ignore it.
self.activate_browser = activate_browser`

This is not true. This is possible according to window manager used by user desktop environment. I use for example XFCE4 and his Xfwm. When I remove from linux/**init**.py on line 40 "windowfocus" command I can refresh browser without window focusing.

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I fount after moment second problem. There is used "--sync" switch for xdotool. It causes problems when browser in "browser" parameter is not open. Sublime hangs because xdotool wait for window that is not open.