Improvements for talk, animation, HDRI sky and pose editor modules

I have made by your requests:

+ Preview for HDRI sky

+ Improvements for talk module:
Volume equalization
Jaw movement amount
Jaw movement speed
Lips blendshape movement amount
Lips blendshape change speed
Frames per update

+ Fix of loading saved animation end time

+ Improvements for pose editor module:
Button "Go to this step" is preview pose settings
Fix of rotation to the left