Revert "Only offer VisualEditor if installed and enabled"

Since VisualEditor is not loaded by default this test cannot be relied on.
Instead we'll probably want to add a config variable to provide this answer.

This reverts commit bfde4e0442235cb71639db302fa355a303087643.

Bug: 63736
Change-Id: I2b0dc377b29356c98ba1db4a8d49242a1d6ab966
Merge "Revert "Only offer VisualEditor if installed and enabled""