Fixed footer to bottom of page (#9860)

website/client/components/appFooter.vue

@@ -1,5 +1,5 @@
 <template lang="pug">
-.row
+.row.footer-row
   buy-gems-modal(v-if='user')
   modify-inventory(v-if="isUserLoaded")
   footer.col-12(:class="{expanded: isExpandedFooter}")
@@ -117,6 +117,11 @@
 </template>
 
 <style lang="scss" scoped>
+  .footer-row {
+    margin: 0;
+    flex: 0 1 auto;
+  }
+
   footer {
     color: #c3c0c7;
     z-index: 17;