Add tooltips on dashboard landing page to describe SMS status

[jonathanbobel]

As a [type of user],

Sender

I want [an action or feature],

To know what the different status mean as it relates to SMS activity

So that [benefit or value].

I can be more clearly informed on how my SMS campaigns are performing

Detailed condition or criteria that must be met for the user story to be considered complete.

• Add tooltips to the SMS activity bar chart legend to describe each status - Delivered, Pending, and Failed

List of specific tasks or sub-tasks that need to be done to implement the user story.

• Clarify content is correct for each status
• HTML/CSS to create and style tooltips
• JS to make tooltips work on hover and tab
• Make tooltips accessible regarding keyboard use and assistive technology

List any dependencies that need to be resolved before starting or completing this user story.

• Make sure we have the correct content for each status

Any additional information or context that might be useful for the team.

• Try out the USWDS tooltip component before writing custom code

[em-herrick]

@jonathanbobel can you add the tool tip content here so @maomeara63 can do a plain language review as we're building?