Filings UI: review inconsistent button colours

In the Todo List (in Filings UI), various items can display with a "View Details" button. This button may be red (`#d3272c`) or blue (`#1669bb`). Normally, red means there's an error condition, but currently the button colours are not consistent with this.

Scenarios:
1. Draft correction or alteration: button is red. **Should be blue?**
2. Draft filing with a pay error: button is red.
3. Draft incorporation or registration: button is blue.
4. Pending filing when payment is incomplete, not including correction or alteration: button is blue. **Should be red?**
5. Pending filing when payment is unsuccessful: button is red.
6. Pending filing (aka paid): button is red. **Should be blue?**

cc: @yuisotozaki