Backgrounds / BuyModal / misc (#9009)

* remove buyModal from all views / move to app.vue - show party member selection if card was bought

* add .btn style to 'show more' / 'show less'

* prevent adding duplicate pinned items - reset pinned gear on rebirth

* remove hourglass in items

* fix unequip gear from drawer

* fix bought item notification

* fix background in avatar - avatar position in buyModal

website/client/components/ui/itemRows.vue

@@ -10,7 +10,7 @@
     div(v-if="items.length === 0")
       p(v-once) {{ noItemsLabel }}
 
-    .btn-flat.btn-show-more(
+    .btn.btn-flat.btn-show-more(
       @click="toggleItemsToShow()",
       v-if="items.length > itemsPerRow"
     ) {{ showAll ? $t('showLess') : $t('showMore') }}