Engine\Part Sliders - Grouping and Symmetry outside of SPH

[Jatwaa]

One of my biggest problems that I have when I leave the SPH is when I want to adjust the engine output of two similar engines and one will slide to say 10% and the other to 10.5%

This easily becomes a bit of a nightmare. As seen in another mod, Kerbal Foundaries, I know it is possible to link the parts via groups and have them all set to the same value when applied. Only one part in the group has to be configured and when you apply to group, it applies the same setting to all the parts in the group.

This, is an amazing benefit in Kerbal Foundries. I feel that this functionality should be applied for all stock engines. Right now the slider is not accurate enough to match the thrusts quickly. I would love to be able to.

1. Configure Engine\part values via direct number entry
   
2. Apply the value to a predetermined group set on the part
   
3. Be able to reconfigure the groupings on the fly
   
4. 
   

That would make the values and adjustments so much more enjoyable (and simple)