Added Timeline Injections

• Added:
- Timeline Injections
- FeaturedGroupsInjection, GroupCategoriesInjection, ProUpgradeInjection, PWAInjection, ShopInjection, TimelineInjectionBase, TimelineInjectionLayout, TimelineInjectionRoot, UserSuggestionsInjection
- Constants
- Redux for timeline_injections
- settings for setting
- popover for dismissing and saving weight

app/javascript/gabsocial/reducers/timeline_injections.js

@@ -0,0 +1,27 @@
+import Immutable from 'immutable'
+import {
+  TIMELINE_INJECTION_SHOW,
+  TIMELINE_INJECTION_HIDE,
+} from '../actions/timeline_injections'
+
+const initialState = Immutable.Map({
+  visibleIds: Immutable.List(),
+  hiddenIds: Immutable.List(),
+})
+
+export default function timeline_injection(state = initialState, action) {
+  switch(action.type) {
+  case TIMELINE_INJECTION_SHOW:
+    return state.withMutations((map) => {
+      map.update('hiddenIds', (list) => list.filterNot((id) => id === action.injectionId))
+      map.update('visibleIds', (list) => list.push(action.injectionId))
+    })
+  case TIMELINE_INJECTION_HIDE:
+    return state.withMutations((map) => {
+      map.update('visibleIds', (list) => list.filterNot((id) => id === action.injectionId))
+      map.update('hiddenIds', (list) => list.push(action.injectionId))
+    })
+  default:
+    return state
+  }
+}