fix a11y for img alts

routes/_components/Avatar.html

@@ -1,4 +1,4 @@
-<img src="{{account.avatar_static}}">
+<img alt="Profile picture for {{account.acct}}" src="{{account.avatar_static}}">
 <style>
   img {
     width: 48px;

routes/settings/instances/[instanceName].html

@@ -9,7 +9,7 @@
     {{#if instanceUserAccount}}
       <h2>Logged in as:</h2>
       <div class="acct-current-user">
-        <img alt="Avatar for {{instanceUserAccount.acct}}"
+        <img alt="Profile picture for {{instanceUserAccount.acct}}"
              class="acct-avatar" src="{{instanceUserAccount.avatar}}" />
         <a class="acct-handle" rel="noopener" target="_blank"
            href="{{instanceUserAccount.url}}">@{{instanceUserAccount.acct}}</a>

routes/settings/instances/add.html

@@ -57,7 +57,6 @@
   import { switchToTheme } from '../../_utils/themeEngine'
   import { toast } from '../../_utils/toast'
   import LoadingMask from '../../_components/LoadingMask'
-  import { fade } from 'svelte-transitions'
 
   const REDIRECT_URI = (typeof location !== 'undefined' ?
       location.origin : 'https://pinafore.social') + '/settings/instances/add'
@@ -79,9 +78,6 @@
       LoadingMask
     },
     store: () => store,
-    transitions: {
-      fade
-    },
     methods: {
       onSubmit: async function(event) {
         event.preventDefault()