mgr/dashboard: Minor fixes (#29009)

mgr/dashboard: Minor fixes

- Fix radio input display
- Fix the close button on initiators card
- Fix missing 'fa-' prefix in spinner icon
- Fix label font-weight

Reviewed-by: Ricardo Marques <rimarques@suse.com>
Reviewed-by: Tatjana Dehler <tdehler@suse.com>

diff --cc src/pybind/mgr/dashboard/frontend/src/styles.scss
Simple merge