J+H ungrabs the ruler

[KatieWoe]

Test device
Dell
Operating System
Win 10
Browser
Chrome
Problem description
For phetsims/qa#455
When using keyboard nav, jumping the ruler to home position ungrabs the ruler.
Steps to reproduce

1. Use keybard nav and go to the ruler
2. Grab the ruler
3. Move it somewhere else
4. Press J and H

Visuals

Troubleshooting information:

!!!!! DO NOT EDIT !!!!!
Name: ‪Gravity Force Lab‬
URL: https://phet-dev.colorado.edu/html/gravity-force-lab/2.2.0-dev.16/phet/gravity-force-lab_all_phet.html
Version: 2.2.0-dev.16 2019-11-06 21:45:42 UTC
Features missing: touch
Flags: pixelRatioScaling
User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/78.0.3904.87 Safari/537.36
Language: en-US
Window: 1536x722
Pixel Ratio: 2.5/1
WebGL: WebGL 1.0 (OpenGL ES 2.0 Chromium)
GLSL: WebGL GLSL ES 1.0 (OpenGL ES GLSL ES 1.0 Chromium)
Vendor: WebKit (WebKit WebGL)
Vertex: attribs: 16 varying: 30 uniform: 4096
Texture: size: 16384 imageUnits: 16 (vertex: 16, combined: 32)
Max viewport: 32767x32767
OES_texture_float: true
Dependencies JSON: {}

[zepumph]

This is expected behavior, bringing the ruler home "let's go" of it. Closing