Missing Textfield label primary color application on focus

[marioavs]

What MDC-Web Version are you using?

0.23.0

What are the steps to reproduce the bug?

1. Run the demo server (it is also present in the demo site https://material-components-web.appspot.com/textfield.html)
2. Go to localhost:8080/textfield.html
3. Check the Dark Theme option for the "Full Functionality JS Component" (second Textfield component). This step is only needed to make more evident the label coloring.
4. Tab-focus on the "Full Functionality JS Component" (second Textfield component)
5. Observe the label color

What is the expected behavior?

The label should be displayed with primary color for focused textfield components

What is the actual behavior?

The label is displayed with the normal / idle color as if it would be a non focused textfield component

Any other information you believe would be useful?

It looks like the following is needed and has been removed from packages/mdc-textfield/mdc-textfield.scss, for the mdc-textfield--focused class:
@include mdc-theme-prop(color, primary);

[reddysridhar53]

Can i take it up?

[dscalzi]

Still an issue on 0.25.0.