[Courses shown] rewording + more emphasis on warning

services/frontend/src/components/PopulationComponents/PopulationCourses/FilterDegreeCoursesModal.tsx

@@ -15,7 +15,7 @@ export const FilterDegreeCoursesModal = ({ degreeProgramme }: { degreeProgramme:
   return (
     <>
       <Button onClick={() => setModalOpen(true)} startIcon={<VisibilityIcon />} variant="outlined">
-        Manage shown courses
+        Manage course visibility
       </Button>
       <Dialog maxWidth="md" onClose={() => setModalOpen(false)} open={modalOpen}>
         <DialogTitle>Degree programme settings</DialogTitle>

services/frontend/src/pages/StudyProgramme/DegreeCoursesTab/InfoBox.tsx

@@ -11,7 +11,7 @@ const textContent = {
 export const ManageCoursesShownInfo = () => {
   const { getTextIn } = useLanguage()
   return (
-    <StyledMessage showIcon variant="outlined" severity="info" sx={{ mb: 2, maxWidth: '100%' }}>
+    <StyledMessage showIcon variant="outlined" severity="warning" sx={{ mb: 2, maxWidth: '100%' }}>
       {getTextIn(textContent)}
     </StyledMessage>
   )