Show one tool after Hide doesn't show on the old position

[PlasmaMichael]

Using the sample, you can hide one tool and show it, that works but the problem is when you show after hide, the tab is not shown on the old position.

[PlasmaMichael]

Apparently it keeps the good position when you dock it one time somewhere, but when you start the sample if you hide and show one tool the position is not kept, maybe one save state is missing on the add.