Rearrange stuff in accordance with comments on the MR, mostly

Also, add support for a custom message to the modified indicator

src/components/settings_modal/helpers/modified_indicator.vue

@@ -15,7 +15,7 @@
       </template>
       <template #content>
         <div class="modified-tooltip">
-          {{ $t('settings.setting_changed') }}
+          {{ $t(messageKey) }}
         </div>
       </template>
     </Popover>
@@ -33,7 +33,13 @@ library.add(
 
 export default {
   components: { Popover },
-  props: ['changed']
+  props: {
+    changed: Boolean,
+    messageKey: {
+      type: String,
+      default: 'settings.setting_changed'
+    }
+  }
 }
 </script>