Alt+Up and Alt+Down do not control history when interactive window launches pinned.

Reported at developer community as https://devdiv.visualstudio.com/DevDiv/_workitems/edit/1178927.

**Workflow:**

1. Open VS and dock the C# interactive window to one of the edges.
2. Pin the window so that it collapses to a tab on the edge.
3. Close VS
4. Open VS
5. Show the C# interactive window by clicking the tab
6. Execute `var a = 5;`
7. Press Alt + Up

**Expected Outcome:**

The current line should match the previous entry and read `var a = 5;`

**Actual Outcome:**

No change to the current line. From debugging the CommandFilter, `pguidCmdGroup` is VsStd12 and the `nCmdID` is MoveSelLinesUp.