Soft shadows and depth layer fixes

This update introduces soft shadows with blur and penumbra settings and fixes issues with depth layers.

Changes

• New: Soft Shadows with Blur and Penumbra settings.
• You can enable or disable Soft Shadows from the Global Settings.
• Fix incorrect results when adding color stops to depth layers.
• Fix issue with inspector modifying wrong object after blurring the input.
• Minor improvements in outliner.
• Minor bug fixes.