Copy over "Boost" hover text fix to detailed view. (#2508)

from #1754, should close out #1394

app/assets/javascripts/components/features/status/components/action_bar.jsx

@@ -9,6 +9,7 @@ const messages = defineMessages({
   mention: { id: 'status.mention', defaultMessage: 'Mention @{name}' },
   reply: { id: 'status.reply', defaultMessage: 'Reply' },
   reblog: { id: 'status.reblog', defaultMessage: 'Reblog' },
+  cannot_reblog: { id: 'status.cannot_reblog', defaultMessage: 'This post cannot be reblogged' },
   favourite: { id: 'status.favourite', defaultMessage: 'Favourite' },
   report: { id: 'status.report', defaultMessage: 'Report @{name}' }
 });
@@ -67,10 +68,12 @@ class ActionBar extends React.PureComponent {
     if (status.get('visibility') === 'direct') reblogIcon = 'envelope';
     else if (status.get('visibility') === 'private') reblogIcon = 'lock';
 
+    let reblog_disabled = (status.get('visibility') === 'direct' || status.get('visibility') === 'private');
+
     return (
       <div className='detailed-status__action-bar'>
         <div className='detailed-status__button'><IconButton title={intl.formatMessage(messages.reply)} icon={status.get('in_reply_to_id', null) === null ? 'reply' : 'reply-all'} onClick={this.handleReplyClick} /></div>
-        <div className='detailed-status__button'><IconButton disabled={status.get('visibility') === 'direct' || status.get('visibility') === 'private'} active={status.get('reblogged')} title={intl.formatMessage(messages.reblog)} icon={reblogIcon} onClick={this.handleReblogClick} /></div>
+        <div className='detailed-status__button'><IconButton disabled={reblog_disabled} active={status.get('reblogged')} title={reblog_disabled ? intl.formatMessage(messages.cannot_reblog) : intl.formatMessage(messages.reblog)} icon={reblogIcon} onClick={this.handleReblogClick} /></div>
         <div className='detailed-status__button'><IconButton animate={true} active={status.get('favourited')} title={intl.formatMessage(messages.favourite)} icon='star' onClick={this.handleFavouriteClick} activeStyle={{ color: '#ca8f04' }} /></div>
         <div className='detailed-status__button'><DropdownMenu size={18} icon='ellipsis-h' items={menu} direction="left" /></div>
       </div>