[DF-421] add ParticleLayer::additive
[DF-421] Code Review - codestyle fix (items 2, 3, 4).
Merge remote-tracking branch 'origin/ParticleEditorQT' into ParticleEditorQT
[DF-421]
update grid text
add lock box
[DF-421]
update particle layer time line
Merge remote-tracking branch 'origin/ParticleEditorQT' into ParticleEditorQT_Refactoring_SceneGraph