Fix mobile view for validity range select in timetables

aleksis/apps/lesrooster/frontend/components/timetables/Timetable.vue

@@ -67,8 +67,11 @@ export default {
 
 <template>
   <timetable-wrapper :on-selected="onSelected">
-    <template #additionalSelect="{ selected }">
-      <v-card class="mb-2">
+    <template #additionalSelect="{ selected, mobile }">
+      <v-card
+        :class="{ 'mb-2': !mobile, 'mx-2 mt-2': mobile }"
+        :outlined="mobile"
+      >
         <v-card-text>
           <time-grid-field
             outlined