[Glitch] Fix low-contrasted cancel button of reply indicator

Port 86efccce2a to glitch-soc

app/javascript/flavours/glitch/features/composer/reply/index.js

@@ -58,6 +58,7 @@ export default class ComposerReply extends React.PureComponent {
             icon='times'
             onClick={handleClick}
             title={intl.formatMessage(messages.cancel)}
+            inverted
           />
           {account ? (
             <AccountContainer