Line charges actually create an electric field

Line charges create an electric field; each line charge element contains
an array of point charges with positions/charge strength affected by
user input

Moving line charges will cause the point charges in its array to update
positions as well, still need to work on rotating

Cleaned up how the charge list list element was displaying coordinates.
Instead of taking two lines, it takes one line. (From X POS: x, Y POS:
y, to (x, y) )

Refactored a little bit