UX: add popup indicating "logged in as"

src/UI/BigComponents/WelcomeBack.svelte

@@ -0,0 +1,39 @@
+<script lang="ts">
+
+  import { Avatar, Popover } from "flowbite-svelte"
+  import { fade } from "svelte/transition"
+  import Tr from "../Base/Tr.svelte"
+  import { OsmConnection } from "../../Logic/Osm/OsmConnection"
+
+  let open = false
+  export let state: { osmConnection: OsmConnection }
+  let userdetails = state.osmConnection.userDetails
+
+  userdetails.addCallbackAndRunD(ud => {
+    if (ud) {
+      open = true
+      window.setTimeout(() => {
+         open = false
+      }, 5000)
+    }
+  })
+</script>
+
+
+<Popover class="mt-4" defaultClass="py-2 px-3 w-fit " trigger=null placement="bottom"
+         transition={e => fade(e, {duration: 150})} bind:open>
+  {#if $userdetails !== undefined}
+    <div style="width: max-content" class="flex items-center">
+      {#if $userdetails.img}
+        <img src={$userdetails.img } alt="profile picture" class="w-8 h-8 rounded-full mr-4" />
+      {/if}
+      <div>
+        <div>Welcome back</div>
+        <div class="normal-background" style="width: max-content">
+          <b>{$userdetails?.name}</b>
+        </div>
+      </div>
+    </div>
+  {/if}
+</Popover>
+