[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/ui/components/boost_modal.js

@@ -21,7 +21,7 @@ const messages = defineMessages({
   public_short: { id: 'privacy.public.short', defaultMessage: 'Public' },
   unlisted_short: { id: 'privacy.unlisted.short', defaultMessage: 'Unlisted' },
   private_short: { id: 'privacy.private.short', defaultMessage: 'Followers-only' },
-  direct_short: { id: 'privacy.direct.short', defaultMessage: 'Direct' },
+  direct_short: { id: 'privacy.direct.short', defaultMessage: 'Mentioned people only' },
 });
 
 const mapStateToProps = state => {

app/javascript/flavours/glitch/features/ui/components/favourite_modal.js

@@ -17,7 +17,7 @@ const messages = defineMessages({
   public_short: { id: 'privacy.public.short', defaultMessage: 'Public' },
   unlisted_short: { id: 'privacy.unlisted.short', defaultMessage: 'Unlisted' },
   private_short: { id: 'privacy.private.short', defaultMessage: 'Followers-only' },
-  direct_short: { id: 'privacy.direct.short', defaultMessage: 'Direct' },
+  direct_short: { id: 'privacy.direct.short', defaultMessage: 'Mentioned people only' },
 });
 
 export default @injectIntl