Timeline virtual scrolling

src/modules/config.js

@@ -65,7 +65,8 @@ export const defaultState = {
   useContainFit: false,
   greentext: undefined, // instance default
   hidePostStats: undefined, // instance default
-  hideUserStats: undefined // instance default
+  hideUserStats: undefined, // instance default
+  virtualScrolling: undefined // instance default
 }
 
 // caching the instance default properties

src/modules/instance.js

@@ -41,6 +41,7 @@ const defaultState = {
   sidebarRight: false,
   subjectLineBehavior: 'email',
   theme: 'pleroma-dark',
+  virtualScrolling: true,
 
   // Nasty stuff
   customEmoji: [],

src/modules/statuses.js

@@ -568,6 +568,9 @@ export const mutations = {
   updateStatusWithPoll (state, { id, poll }) {
     const status = state.allStatusesObject[id]
     status.poll = poll
+  },
+  setVirtualHeight (state, { statusId, height }) {
+    state.allStatusesObject[statusId].virtualHeight = height
   }
 }
 
@@ -753,6 +756,9 @@ const statuses = {
           store.commit('addNewStatuses', { statuses: data.statuses })
           return data
         })
+    },
+    setVirtualHeight ({ commit }, { statusId, height }) {
+      commit('setVirtualHeight', { statusId, height })
     }
   },
   mutations