Remove meter mark and adjust phrasing in Sphere descriptions

[terracoda]

Based on changes made in GFL Basics and decision in #168, I have some adjustments to the dynmaic state descriptions for the mass spheres in the Play Area.

Please see Table: Examples - Dynamic state descriptions m1 & m2

Here's the old and new example for m1, Blue Sphere with Force Values checked:
m1, Blue Sphere (old)

• Force on ‪m1‬ by ‪m2‬ is small, and vector points directly at ‪m2‬.
• Force vector magnitude is 0.166852 micronewtons.
• ‪m1‬ is very small at 100 kilograms and at 2.8 ‪meter‬ mark.

m1, Blue Sphere (new)

• Force vector is {{small}}, and points directly at ‪{{m2}}‬.
• Force magnitude on m2 by m1 is {{0.166852 }} micronewtons.
• ‪m1‬ is {{100}} kilograms, {{much much smaller than}} m2, and also {{4}} meters from ‪m2.

All other examples showing the different states depending on which checkboxes are checked are in the design doc in Table: Examples - Dynamic state descriptions m1 & m2.

Edits

• Sept 24, 2019 - Changed values to reflect new values on page load!

[terracoda]

@zepumph, this might be a repeat issue of #160 (comment) (apologies)

[zepumph]

Before I start this work, here is a snippet of GFLB, so I can regression test:

[zepumph]

This has been implemented. @terracoda please review. Specifically please focus on the following items

• Please check that the two object labels (like on m1 by m2) is correct and not backwards
• Make sure that they update to changes in the sim as expected (especially the control panel checkboxes)

Thanks!

[terracoda]

Looks good @zepumph! Closing!