Fix scrollbar styles on compose textarea, small bugs (mastodon#10292)

Author: Gargron

app/javascript/mastodon/features/compose/components/poll_form.js

@@ -48,7 +48,7 @@ class Option extends React.PureComponent {
           <input
             type='text'
             placeholder={intl.formatMessage(messages.option_placeholder, { number: index + 1 })}
-            maxlength={25}
+            maxLength={25}
             value={title}
             onChange={this.handleOptionTitleChange}
           />

app/javascript/mastodon/features/notifications/components/notification.js

@@ -33,7 +33,7 @@ class Notification extends ImmutablePureComponent {
     onFavourite: PropTypes.func.isRequired,
     onReblog: PropTypes.func.isRequired,
     onToggleHidden: PropTypes.func.isRequired,
-    status: PropTypes.option,
+    status: ImmutablePropTypes.map,
     intl: PropTypes.object.isRequired,
     getScrollPosition: PropTypes.func,
     updateScrollBottom: PropTypes.func,

app/javascript/styles/mastodon/components.scss

@@ -357,6 +357,11 @@
     padding-bottom: 0;
     padding-right: 10px + 22px;
     resize: none;
+    scrollbar-color: initial;
+
+    &::-webkit-scrollbar {
+      all: unset;
+    }
 
     @media screen and (max-width: 600px) {
       height: 100px !important; // prevent auto-resize textarea