Quick mobile + wide display UX sweep
Fix the various mobile layout issues across the app:
- [x] `is-fluid` (remove so wide monitors clamp via likely `.container`)
- [x] `flex-wrap: wrap` where needed
- [x] `overflow-x` for `<table>`s and overflow vs. stack for other containers that currently surpass the `100vw`
- [x] properly stacking for headers with actions container opposite it
issue