[design] [Notifications] Implement new visual designs for Snap Decisions and other notifications

[Estibaliz Landa Torres]

The poor discoverabiltiy of the text field for snap decision (lack of contrast)

One participant discovered the snap decision, however, after he clicked on the message button, he could not locate the text field immeditately as it was blended into the background.

--------UX comment---------

We've added in the latest UX spec for notifications bubbles the visual specifications for the different notifications styles. Link to the spec: https://docs.google.com/a/canonical.com/document/d/1xDSZ_dnAMAlhgFnnyjJEibaITXjVLp1_pnj_tATNm9I/edit#heading=h.aarksr1t9zhb

[Victor Tuson Palau (vtuson)]

suggest this is a "high" bug

[kevin gunn (kgunn72)]

@victor this is likely gonna need to be an ota given the calendar and not having design input yet

[kevin gunn (kgunn72)]

this was discussed at the Tyson's Corner sprint
ultimately we are at a technical dead end wrt abusing notifications. This is needing some design & architectural input as we've discussed possibly using a central service to better handle text feilds, sliders, etc.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.