Add show more/less toggle for entire threads in web UI

Inspired from b6003afcdb but using component
properties instead of redux store for hidden/revealed state.

app/javascript/flavours/glitch/components/column_header.js

@@ -23,11 +23,12 @@ export default class ColumnHeader extends React.PureComponent {
 
   static propTypes = {
     intl: PropTypes.object.isRequired,
-    title: PropTypes.node.isRequired,
-    icon: PropTypes.string.isRequired,
+    title: PropTypes.node,
+    icon: PropTypes.string,
     active: PropTypes.bool,
     localSettings : ImmutablePropTypes.map,
     multiColumn: PropTypes.bool,
+    extraButton: PropTypes.node,
     showBackButton: PropTypes.bool,
     notifCleaning: PropTypes.bool, // true only for the notification column
     notifCleaningActive: PropTypes.bool,
@@ -86,7 +87,7 @@ export default class ColumnHeader extends React.PureComponent {
   }
 
   render () {
-    const { intl, icon, active, children, pinned, onPin, multiColumn, showBackButton, intl: { formatMessage }, notifCleaning, notifCleaningActive } = this.props;
+    const { intl, icon, active, children, pinned, onPin, multiColumn, extraButton, showBackButton, intl: { formatMessage }, notifCleaning, notifCleaningActive } = this.props;
     const { collapsed, animating, animatingNCD } = this.state;
 
     let title = this.props.title;
@@ -162,18 +163,26 @@ export default class ColumnHeader extends React.PureComponent {
     }
 
     if (children || multiColumn) {
-      collapseButton = <button className={collapsibleButtonClassName} aria-label={formatMessage(collapsed ? messages.show : messages.hide)} aria-pressed={collapsed ? 'false' : 'true'} onClick={this.handleToggleClick}><i className='fa fa-sliders' /></button>;
+      collapseButton = <button className={collapsibleButtonClassName} title={formatMessage(collapsed ? messages.show : messages.hide)} aria-label={formatMessage(collapsed ? messages.show : messages.hide)} aria-pressed={collapsed ? 'false' : 'true'} onClick={this.handleToggleClick}><i className='fa fa-sliders' /></button>;
     }
 
+    const hasTitle = icon && title;
+
     return (
       <div className={wrapperClassName}>
         <h1 className={buttonClassName}>
-          <button onClick={this.handleTitleClick}>
-            <i className={`fa fa-fw fa-${icon} column-header__icon`} />
-            {title}
-          </button>
+          {hasTitle && (
+            <button onClick={this.handleTitleClick}>
+              <i className={`fa fa-fw fa-${icon} column-header__icon`} />
+              {title}
+            </button>
+          )}
+
+          {!hasTitle && backButton}
+
           <div className='column-header__buttons'>
-            {backButton}
+            {hasTitle && backButton}
+            {extraButton}
             { notifCleaning ? (
               <button
                 aria-label={msgEnterNotifCleaning}

app/javascript/flavours/glitch/components/status.js

@@ -47,10 +47,11 @@ export default class Status extends ImmutablePureComponent {
     onMoveDown: PropTypes.func,
     getScrollPosition: PropTypes.func,
     updateScrollBottom: PropTypes.func,
+    expanded: PropTypes.bool,
   };
 
   state = {
-    isExpanded: false,
+    isExpanded: this.props.expanded,
     isCollapsed: false,
     autoCollapsed: false,
   }
@@ -92,6 +93,9 @@ export default class Status extends ImmutablePureComponent {
       nextProps.collapse !== this.props.collapse &&
       nextProps.collapse !== undefined
     ) this.setCollapsed(nextProps.collapse);
+    if (nextProps.expanded !== this.props.expanded &&
+      nextProps.expanded !== undefined
+    ) this.setExpansion(nextProps.expanded);
   }
 
   //  When mounting, we just check to see if our status should be collapsed,
@@ -465,7 +469,7 @@ export default class Status extends ImmutablePureComponent {
             media={media}
             mediaIcon={mediaIcon}
             expanded={isExpanded}
-            setExpansion={setExpansion}
+            onExpandedToggle={this.handleExpandedToggle}
             parseClick={parseClick}
             disabled={!router}
           />

app/javascript/flavours/glitch/components/status_content.js

@@ -12,7 +12,7 @@ export default class StatusContent extends React.PureComponent {
     status: ImmutablePropTypes.map.isRequired,
     expanded: PropTypes.bool,
     collapsed: PropTypes.bool,
-    setExpansion: PropTypes.func,
+    onExpandedToggle: PropTypes.func,
     media: PropTypes.element,
     mediaIcon: PropTypes.string,
     parseClick: PropTypes.func,
@@ -112,8 +112,8 @@ export default class StatusContent extends React.PureComponent {
   handleSpoilerClick = (e) => {
     e.preventDefault();
 
-    if (this.props.setExpansion) {
-      this.props.setExpansion(!this.props.expanded);
+    if (this.props.onExpandedToggle) {
+      this.props.onExpandedToggle();
     } else {
       this.setState({ hidden: !this.state.hidden });
     }
@@ -132,7 +132,7 @@ export default class StatusContent extends React.PureComponent {
       disabled,
     } = this.props;
 
-    const hidden = this.props.setExpansion ? !this.props.expanded : this.state.hidden;
+    const hidden = this.props.onExpandedToggle ? !this.props.expanded : this.state.hidden;
 
     const content = { __html: status.get('contentHtml') };
     const spoilerContent = { __html: status.get('spoilerHtml') };