Update OpenCollar - leashParticle.lsl

added reading default particles parameters from 'defaultsettings' notecard, if it's present.
changed method of save/restore particles settings.
refined treatment menu buttons.

tested on a cat =^_^=
Merge pull request #212 from RomkaSwallowtail/patch-101

Update OpenCollar - leashParticle.lsl   defaultsettings?