Change onboarding flow in web UI (#32998)

app/javascript/styles/mastodon-light/diff.scss

@@ -447,17 +447,26 @@
   color: lighten($ui-highlight-color, 8%);
 }
 
-.compose-form .autosuggest-textarea__textarea,
-.compose-form__highlightable,
-.autosuggest-textarea__suggestions,
-.search__input,
-.search__popout,
 .emoji-mart-search input,
 .language-dropdown__dropdown .emoji-mart-search input,
 .poll__option input[type='text'] {
   background: darken($ui-base-color, 10%);
 }
 
+.search__popout__menu__item {
+  &:hover,
+  &:active,
+  &:focus,
+  &.active {
+    color: $white;
+
+    mark,
+    .icon-button {
+      color: $white;
+    }
+  }
+}
+
 .inline-follow-suggestions {
   background-color: rgba($ui-highlight-color, 0.1);
   border-bottom-color: rgba($ui-highlight-color, 0.3);