Small fixes

webclient/src/Classes.js

@@ -139,7 +139,7 @@ function NewClassTableCourse(props) {
 
 				{user &&
 					<div className='interest'>
-						{user.interests.includes(course.id) ?
+						{user.interests.filter(x => !x.satisfied_by).map(x => x.course).includes(course.id) ?
 							'Interested ✅'
 						:
 							<Button

webclient/src/Courses.js

@@ -111,7 +111,9 @@ export function Courses(props) {
 										<Link to={'/courses/'+x.id}>{x.name}</Link>
 									</Table.Cell>
 									<Table.Cell>
-										{x.num_interested}
+										{!!x.num_interested &&
+											<>{x.num_interested} member{x.num_interested !== 1 && 's'}</>
+										}
 									</Table.Cell>
 									<Table.Cell>
 										{!!x.tags && x.tags.split(',').map(name =>