Usine 4.20b details fixed

[senso]

[4.20b]
Some details fixed. you can skip this version if everything rocks on your system.

fixed bugs
- in some host UsineVSTi doesn't appear as a VST instrument
- the remotes assignations aren't loaded in the patches of the sequencer
- various details in the step module interface

[stanlea]

Happy ! TheD: bug is fixed. Thanks.