fix request center UI (#10824)

* fix request center UI

* remove not require css

* removed not used classes

app/assets/stylesheets/chat.scss

@@ -244,7 +244,7 @@
   font-size: var(--fs-base);
   flex-grow: 1;
   height: 300px;
-  overflow-y: auto;
+  overflow-y: hidden;
   overflow-x: hidden;
   text-align: left;
   overscroll-behavior-y: contain;
@@ -1044,6 +1044,7 @@
   min-height: 2.5rem;
   resize: vertical;
   max-height: 8rem;
+  overflow: hidden;
 }
 
 .composer-btn-group {

app/javascript/chat/RequestManager/RequestManager.jsx

@@ -130,7 +130,7 @@ export default class RequestManager extends Component {
     const { channelJoiningRequests, userInvitations } = this.state;
 
     return (
-      <div className="activechatchannel__activeArticle activesendrequest">
+      <div>
         <div className="p-4">
           <HeaderSection />
           {channelJoiningRequests.length <= 0 && userInvitations.length <= 0 ? (

app/javascript/chat/channelRequest.jsx

@@ -3,7 +3,7 @@ import PropTypes from 'prop-types';
 import { Button } from '@crayons';
 
 const ChannelRequest = ({ resource: data, handleJoiningRequest }) => (
-  <div className="activechatchannel__activeArticle activesendrequest">
+  <div>
     <div className="joining-message">
       <h2>Hey {data.user.name} !</h2>
       <h3>You are not a member of this group yet. Send a request to join.</h3>