Navigation controls- customization

[wim (Wim Dekeyser)]

@Helvetosaur

If you invert the scale factor (larger than 1.0), when you type Zoom In, it will zoom out…

@AlW, @dan, all,
@mikko now fixed this in the windows version:
http://mcneel.myjetbrains.com/youtrack/issue/RH-30386

For now I fixed the obvious bug in Zoom and ZoomLens command. Both now always zoom in with the “In” option, and out with the “Out” option, regardless of zoom scale factor being bigger or smaller than one. I didn’t add any extra settings to Options yet. I’m not sure what it needs. If the wheel zoom direction expectation in Macverse is reversed from Windowsverse, perhaps the Mac default zoom scale factor should be more than one.