[Glitch] Rename toots to posts in various places, add or reword DM warnings

Port part of be0bc9acbf and 7e244879fe
to glitch-soc

app/javascript/flavours/glitch/features/direct_timeline/index.js

@@ -119,6 +119,7 @@ class DirectTimeline extends React.PureComponent {
           scrollKey={`direct_timeline-${columnId}`}
           timelineId='direct'
           onLoadMore={this.handleLoadMore}
+          prepend={<div className='follow_requests-unlocked_explanation'><span><FormattedMessage id='compose_form.encryption_warning' defaultMessage='Posts on Mastodon are not end-to-end encrypted. Do not share any dangerous information over Mastodon.' /> <a href='/terms' target='_blank'><FormattedMessage id='compose_form.direct_message_warning_learn_more' defaultMessage='Learn more' /></a></span></div>}
           emptyMessage={<FormattedMessage id='empty_column.direct' defaultMessage="You don't have any direct messages yet. When you send or receive one, it will show up here." />}
         />
       );