Small fixes to education theme, temporarily hide from overview

assets/layers/school/school.json

@@ -43,7 +43,9 @@
     },
     {
       "id": "capacity",
-      "question": "How much students can at most enroll in this school?",
+      "question": {
+        "en": "How much students can at most enroll in this school?"
+      },
       "render": {
         "en": "This school can enroll at most {capacity} students"
       },

assets/themes/education/education.json

@@ -18,5 +18,6 @@
     "tertiary_education",
     "school",
     "kindergarten_childcare"
-  ]
+  ],
+  "hideFromOverview": true
 }

langs/layers/en.json

@@ -4924,6 +4924,7 @@
         },
         "tagRenderings": {
             "capacity": {
+                "question": "How much students can at most enroll in this school?",
                 "render": "This school can enroll at most {capacity} students"
             },
             "education-level-belgium": {