Misc fixes: Fix uploads stretching on chrome, fix warnings in console

No visible changes on firefox, on chromium uploads no longer stretch vertically and look same as on firefox.

src/components/attachment/attachment.vue

@@ -68,6 +68,7 @@
     max-height: 200px;
     max-width: 100%;
     display: flex;
+    align-items: center;
     video {
       max-width: 100%;
     }