Directional light shadows manipulations and Experimental light equipment

I have made by your requests:

+ Fix of Directional light intensity slider
+ On/Off shadows moved to new shadows block (Directional light settings)
+ Directional light shadows Near clipping plane
+ Directional light Shadow cone

Experimental light equipment:
+ Fix of delete equipment
+ Fix of intensity slider
+ Intensity multiplier
+ Volumetrics multiplier
+ Shadow dimmer
+ Fade distance
+ Shadows On/Off
+ Shadows Near clipping plane
+ Shadow cone