Before this commit, `beforeStepIndex` (now `_powerboxBeforeStepIndex`),
was set at the wrong time.
The callback `onOpen` was called after opening the powerbox from the
`_onInput`. The calculation of `beforeStepIndex` presuposed the step
that add `/` happened. Thefore the calculation
`this._historySteps.length - 2` was made rather than
`this._historySteps.length - 1`.
But that presuposition is wrong.
The best time to know until which step index to revert is before any
possible step occurs.
task-2980550
closesodoo/odoo#100009
Signed-off-by: David Monjoie (dmo) <dmo@odoo.com>
Nicolas Bayet
3f5ae2400e