Add hideMutedPosts setting and wire up to post-returning endpoints

src/modules/config.js

@@ -5,6 +5,7 @@ const browserLocale = (window.navigator.language || 'en').split('-')[0]
 
 const defaultState = {
   colors: {},
+  hideMutedPosts: undefined, // instance default
   collapseMessageWithSubject: undefined, // instance default
   hideAttachments: false,
   hideAttachmentsInConv: false,

src/modules/instance.js

@@ -18,6 +18,7 @@ const defaultState = {
   scopeOptionsEnabled: true,
   formattingOptionsEnabled: false,
   alwaysShowSubjectInput: true,
+  hideMutedPosts: false,
   collapseMessageWithSubject: false,
   hidePostStats: false,
   hideUserStats: false,