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####	Todo Sam R		####
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####	For Discussion	####
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-"Show Ftotal, Show Ffriction,..." checkboxes with Force graph might be coupled to "Show component force, Show total force" boxes. So, for instance, if you turn off the Ftotal in the graph, the Total Force arrow also disappears.

-wiggle me was removed from FBD in convert to piccolo in FreeBodyDiagramPanel, should we add this back?

Less urgent general issues:

-make the zero line for graphs thicker to stand out from other non-zero values

- in interviews, students entered numbers in the "Applied Force" box, but did not know to hit enter.
They would hit pause, enter a value, then hit go.
The result of this is that the sim starts again without changing the force.
Perhaps these is a way to make it automatically accept the value entered when you hit the "go" button?

- when "more controls" are visible, students were confused as to which text
box when with which slider. This seems to be because the labels are closer to
the text box of the control above (with only a line separator between, which did not seem to help).
Space these controls out more or put the the text box next to the label (say to the right of the label)
instead of below the slider.