* Grafana UI: Setup component

* Grafana UI: DashboardFileUpload => FileUpload

* Grafana UI: Expand docs

* Grafana UI: Add className

* Grafana UI: Update import

* Grafana UI: Clarify props

* Update packages/grafana-ui/src/components/FileUpload/FileUpload.tsx

Co-authored-by: Tobias Skarhed <1438972+tskarhed@users.noreply.github.com>

* Grafana UI: Style icon

* Grafana UI: Show uploaded file name

* Grafana UI: Add tests

* Grafana UI: Add useStyles + useCallback

* Grafana UI: Remove stylesFactory

* Grafana UI: Revert to useTheme

Co-authored-by: Tobias Skarhed <1438972+tskarhed@users.noreply.github.com>