Bug in SidebarController.IsOpen

Looks like the code has the sense of the boolean inverted. If I set `IsOpen= true`, the menu should open, not close.

```
public bool IsOpen
{
get { return _sidebar.IsOpen; }
set
{
_sidebar.IsOpen = value;
if (_sidebar.IsOpen)
CloseMenu();
else
OpenMenu();
}
}
```

Also, setting `_sidebar.IsOpen` prevents the opening. So the code should simply read:

```
public bool IsOpen
{
get { return _sidebar.IsOpen; }
set
{
if (value)
_sidebar.OpenMenu();
else
_sidebar.CloseMenu();
}
}
```

Is this correct?

Thanks!