Utils - Expression mixer sliders does not follow current Pose - expression

[Fak3]

version: git master

I went to "Pose/Animate" tab -> "Expressions", and applied expression. Then i opened "Utilites" -> "Expression mixer" tab and wanted to fine-tune the applied expression. But all the sliders here are being set to zero, as if no expression applied. It is hard to tell the real position of the slider (which should correspond to visible result) to fine-tune it.

[Aranuvir]

We could do better here. I've created a partial fix, now. With the latest commit, at least, it is possible to load an expression to the mixer, tweak it and save it back. A combination of the expression plugin and the mixer plugin is still wip...