Fix disabled state for dashboard buttons

[jessabean]

Description

This is a hotfix for a bug I noticed: the disabled buttons and links on the work plan dashboard were extremely light and do not meet accessibility contrast standards

Related ticket(s)

N/A

How to test

1. Log in as a state user and create a work plan
2. Stay on the dashboard and see the disabled "Continue MFP Work Plan" and "Reset MFP Work Plan" buttons. They should be legible.

Before

After

[codeclimate]

Code Climate has analyzed commit 616553d and detected 0 issues on this pull request.

The test coverage on the diff in this pull request is 100.0% (90% is the threshold).

This pull request will bring the total coverage in the repository to 92.7% (0.0% change).

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[bangbay-bluetiger]

LGTM

[ntsummers1]

I'll give this an approval cause I actually disagree with WCAG here, but to my knowledge we don't actually need to meet color contrast for disabled elements. In WCAG it states that "Text or images of text that are part of an inactive user interface component, ... have no contrast requirement." So buttons that are disabled can be greyed out. Still, I don't think this hurts anything so take my 👍

[jessabean]

I'll give this an approval cause I actually disagree with WCAG here, but to my knowledge we don't actually need to meet color contrast for disabled elements. In WCAG it states that "Text or images of text that are part of an inactive user interface component, ... have no contrast requirement." So buttons that are disabled can be greyed out. Still, I don't think this hurts anything so take my 👍

oooh, TIL!! In any case, the extra light disabled state does not match the CMSDS disabled styles, so yes...I'll take your 👍🏻 lol