Fix styling and desiging issues

hypha/apply/activity/messaging.py

hypha/apply/api/v1/screening/views.py

hypha/apply/funds/forms.py

hypha/apply/funds/models/submissions.py

...s/templates/funds/applicationsubmission_admin_detail.html

.../apply/funds/templates/funds/includes/screening_form.html

...unds/templates/funds/includes/screening_status_block.html

hypha/apply/funds/views.py

hypha/static_src/src/javascript/apply/flag.js

hypha/static_src/src/javascript/apply/screening-status.js

hypha/static_src/src/sass/apply/components/_icon.scss

hypha/templates/includes/sprites.html