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/actions/timeline_injections.js

@@ -0,0 +1,32 @@
+import {
+  TIMELINE_INJECTION_WEIGHT_DEFAULT,
+  TIMELINE_INJECTION_WEIGHT_MULTIPLIER,
+  TIMELINE_INJECTION_WEIGHT_SUBTRACTOR,
+  TIMELINE_INJECTION_WEIGHT_MIN,
+} from '../constants'
+import { changeSetting } from './settings'
+
+export const TIMELINE_INJECTION_SHOW = 'TIMELINE_INJECTION_SHOW'
+export const TIMELINE_INJECTION_HIDE = 'TIMELINE_INJECTION_HIDE'
+
+export const showTimelineInjection = (injectionId) => (dispatch) => {
+  dispatch({
+    type: TIMELINE_INJECTION_SHOW,
+    injectionId,
+  })
+}
+
+export const hideTimelineInjection = (injectionId) => (dispatch, getState) => {
+  const existingInjectionWeight = getState().getIn(['settings', 'injections', injectionId], null)
+
+  if (!existingInjectionWeight) return false
+
+  const newInjectionWeight = Math.max(existingInjectionWeight - 0.005, 0.01)
+
+  dispatch(changeSetting(['injections', injectionId], newInjectionWeight))
+
+  dispatch({
+    type: TIMELINE_INJECTION_HIDE,
+    injectionId,
+  })
+}