Revert "ref #6568 Replace e3 perspective switcher with e4 alternative"
This reverts commit 92ff410d0000b0d2ddf317a41738b218a5f6a33c.
Revert "ref #6568 Replace e3 perspective switcher with e4 alternative"
This reverts commit 92ff410d0000b0d2ddf317a41738b218a5f6a33c.