Move inert tests to top level directory and rename with .tentative

Remove duplicate test which ended up in editing/focus/inert.

Bug: 692360
Change-Id: I25571a7e731cd8ce5f1fce85e9d246939b78690b
Reviewed-on: https://chromium-review.googlesource.com/1168267
Commit-Queue: Alice Boxhall <aboxhall@chromium.org>
Reviewed-by: Philip Jägenstedt <foolip@chromium.org>
Cr-Commit-Position: refs/heads/master@{#587399}
9 files changed