Add floating status-previews on reply-link mouseover in conversations and make them optional in the settings, fix a small visual inconsistency in muted statuses while editing the file already..

src/main.js

@@ -34,6 +34,7 @@ const persistedStateOptions = {
     'config.hideAttachmentsInConv',
     'config.hideNsfw',
     'config.autoLoad',
+    'config.hoverPreview',
     'config.muteWords',
     'statuses.notifications',
     'users.users'