[Glitch] Fix scrollbar styles on compose textarea, small bugs

Port 6a3f08661f to glitch-soc

app/javascript/flavours/glitch/features/composer/poll_form/components/poll_form.js

@@ -51,7 +51,7 @@ class Option extends React.PureComponent {
           <input
             type='text'
             placeholder={intl.formatMessage(messages.option_placeholder, { number: index + 1 })}
-            maxlength={pollLimits.max_option_chars}
+            maxLength={pollLimits.max_option_chars}
             value={title}
             onChange={this.handleOptionTitleChange}
           />

app/javascript/flavours/glitch/styles/components/composer.scss

@@ -147,6 +147,11 @@
       font-size: 14px;
       font-family: inherit;
       resize: none;
+      scrollbar-color: initial;
+
+      &::-webkit-scrollbar {
+        all: unset;
+      }
 
       &:disabled { background: $ui-secondary-color }
       &:focus { outline: 0 }