Tweak purge room dialog

Change to "delete room", issue #118

src/assets/translations/en.json

@@ -146,9 +146,9 @@
     "leave": "Leave"
   },
   "purge_room": {
-    "title": "Purge room?",
-    "info": "This operation will close the room for all members. It cannot be undone.",
-    "button": "Purge room"
+    "title": "Delete room?",
+    "info": "This will close the room for all members. It cannot be undone.",
+    "button": "Delete room"
   },
   "room_info": {
     "title": "Room Details",

src/components/PurgeRoomDialog.vue

@@ -2,7 +2,6 @@
   <v-dialog v-model="showDialog" v-show="room" class="ma-0 pa-0" width="80%">
     <div class="dialog-content text-center">
       <template>
-        <v-icon color="black" size="30">lock</v-icon>
         <h2 class="dialog-title">{{ $t("purge_room.title") }}</h2>
         <div class="dialog-text">
           {{ $t("purge_room.info") }}