symbols with incorrect font

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There are some symbols that are not rendered in the correct font. In 1.0.0-dev.17:

• [x] y in the Equations accordion box and Fit panel:

• [ ] D_y on points:

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Fixing y was straightforward.

Fixing D_y is not going to be straightforward. The label and value are all one string.

@amanda-phet could you please confirm that D_y should be in Math font?

[pixelzoom]

In #147, 'D' was changed to '∆', so points now look like this:

@amanda-phet should '∆_y' be in PhET's standard math font?

[amanda-phet]

Yes, they probably should use math font and should look like this:

The delta should not look italicized, and I'm pretty sure our "math font" is times italic, right? So if you make it "math font" I'd like to take one last look at it.

[amanda-phet]

Isn't delta unicode? Anyway, I'm not exactly sure how it's going to be handled, but I imagine if it's a symbol that it won't be affected by the font.

[pixelzoom]

It going to be difficult to use different font for 'Δ' and 'y'. We typically do subscripts using RichText and HTML markup, in this case: "Δ_y". To do different fonts, we'll need to create custom code to handle the subscript. And because font height different across browsers, the 'y' subscript will not be in the same place as other subscripts (may be off a pixel or so).

So my recommendation is to pick one of these options:

(1) Leave with 'y' in non-math font, as it is in the current implementation. This is zero cost.

(2) Use math font for both the 'Δ' and 'y', i.e Δ_y. This is 30-60 minutes of code changes.

If it were my decision, I'd go with (2).

[pixelzoom]

I said:

... So my recommendation is to pick one of these options: ...

Scratch that. I figured out how to style the 'Δ' and 'y' separately, see screenshot below.

@amanda-phet please verify in master.

[amanda-phet]

Looks good to me.