Helps when adjusting y-axis and improves extreme signal values #8

[Lucas-Mc]

This change makes it easier to adjust the y-axis by adding space between the signals to make the boundaries between the graph adjustments more clear. In the future I wish to make these buttons bigger (I know how but not sure why it isn't working just yet):

rect.ndrag.drag.cursor-n-resize {
  height: 40px;
  width: 40px;
}

Anyway, I also increased the signal initial display range and expanded the grid lines and labels to go to the extreme values since speed isn't as much of an issue anymore.

EDIT, I meant to add this earlier but here is the functionality. You can adjust the height of the axes by hovering your cursor over either the top or bottom tick label and clicking and dragging it up or down, respectively. Here is approximately what the arrows should look like:

FIxes #8.