workbench.action.focusRightGroup not focusing all editor groups

[Tyriar]

VS Code version: Code - Insiders 1.24.0-insider (41a7c49, 2018-05-29T06:09:34.618Z)
OS version: Windows_NT x64 10.0.16299

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#50458

Keybinding:

{ "key": "alt+right",       "command": "workbench.action.focusRightGroup", "when": "editorTextFocus" },

Start state:

Pressing alt+right 5 times results in:

1. Top-right focused
2. Bottom-left focused
3. Top-right focused (moves the cursor to a seemingly random position)
4. Bottom-left focused
5. Nothing

[bpasero]

Treating as duplicate of #50679. I would not expect the focus to change once you are on the right hand side of the grid and continue to invoke this action. The fix is to implement these commands within the grid widget.