[Glitch] Change dropdown menu icon to not be replaced by close icon when open in web UI

Port 2347ea813e to glitch-soc

Signed-off-by: Claire <claire.github-309c@sitedethib.com>

app/javascript/flavours/glitch/components/dropdown_menu.jsx

@@ -9,7 +9,6 @@ import ImmutablePropTypes from 'react-immutable-proptypes';
 import { supportsPassiveEvents } from 'detect-passive-events';
 import Overlay from 'react-overlays/Overlay';
 
-import CloseIcon from '@/material-icons/400-24px/close.svg?react';
 import { CircularProgress } from 'flavours/glitch/components/circular_progress';
 import { WithRouterPropTypes } from 'flavours/glitch/utils/react_router';
 
@@ -298,7 +297,7 @@ class Dropdown extends PureComponent {
     }) : (
       <IconButton
         icon={!open ? icon : 'close'}
-        iconComponent={!open ? iconComponent : CloseIcon}
+        iconComponent={iconComponent}
         title={title}
         active={open}
         disabled={disabled}

app/javascript/flavours/glitch/features/ui/index.jsx

@@ -83,7 +83,6 @@ const mapStateToProps = state => ({
   hasMediaAttachments: state.getIn(['compose', 'media_attachments']).size > 0,
   canUploadMore: !state.getIn(['compose', 'media_attachments']).some(x => ['audio', 'video'].includes(x.get('type'))) && state.getIn(['compose', 'media_attachments']).size < 4,
   isWide: state.getIn(['local_settings', 'stretch']),
-  dropdownMenuIsOpen: state.dropdownMenu.openId !== null,
   unreadNotifications: state.getIn(['notifications', 'unread']),
   showFaviconBadge: state.getIn(['local_settings', 'notifications', 'favicon_badge']),
   hicolorPrivacyIcons: state.getIn(['local_settings', 'hicolor_privacy_icons']),
@@ -274,7 +273,6 @@ class UI extends PureComponent {
     hasMediaAttachments: PropTypes.bool,
     canUploadMore: PropTypes.bool,
     intl: PropTypes.object.isRequired,
-    dropdownMenuIsOpen: PropTypes.bool,
     unreadNotifications: PropTypes.number,
     showFaviconBadge: PropTypes.bool,
     hicolorPrivacyIcons: PropTypes.bool,
@@ -600,7 +598,7 @@ class UI extends PureComponent {
 
   render () {
     const { draggingOver } = this.state;
-    const { children, isWide, location, dropdownMenuIsOpen, layout, moved } = this.props;
+    const { children, isWide, location, layout, moved } = this.props;
 
     const className = classNames('ui', {
       'wide': isWide,
@@ -632,7 +630,7 @@ class UI extends PureComponent {
 
     return (
       <HotKeys keyMap={keyMap} handlers={handlers} ref={this.setHotkeysRef} attach={window} focused>
-        <div className={className} ref={this.setRef} style={{ pointerEvents: dropdownMenuIsOpen ? 'none' : null }}>
+        <div className={className} ref={this.setRef}>
           {moved && (<div className='flash-message alert'>
             <FormattedMessage
               id='moved_to_warning'