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/constants.js

@@ -34,6 +34,7 @@ export const POPOVER_SIDEBAR_MORE = 'SIDEBAR_MORE'
 export const POPOVER_STATUS_OPTIONS = 'STATUS_OPTIONS'
 export const POPOVER_STATUS_EXPIRATION_OPTIONS = 'STATUS_EXPIRATION_OPTIONS'
 export const POPOVER_STATUS_VISIBILITY = 'STATUS_VISIBILITY'
+export const POPOVER_TIMELINE_INJECTION_OPTIONS = 'TIMELINE_INJECTION_OPTIONS'
 export const POPOVER_USER_INFO = 'USER_INFO'
 export const POPOVER_VIDEO_STATS = 'VIDEO_STATS'
 
@@ -136,4 +137,16 @@ export const GROUP_TIMELINE_SORTING_TYPE_TOP_OPTION_YEARLY = 'yearly'
 export const GROUP_TIMELINE_SORTING_TYPE_TOP_OPTION_ALL_TIME = 'all_time'
 
 export const TOAST_TYPE_ERROR = 'error'
-export const TOAST_TYPE_SUCCESS = 'success'
+export const TOAST_TYPE_SUCCESS = 'success'
+
+export const TIMELINE_INJECTION_FEATURED_GROUPS = 'TI_FEATURED_GROUPS'
+export const TIMELINE_INJECTION_GROUP_CATEGORIES = 'TI_GROUP_CATEGORIES'
+export const TIMELINE_INJECTION_PRO_UPGRADE = 'TI_PRO_UPGRADE'
+export const TIMELINE_INJECTION_PWA = 'TI_PWA'
+export const TIMELINE_INJECTION_SHOP = 'TI_SHOP'
+export const TIMELINE_INJECTION_USER_SUGGESTIONS = 'TI_USER_SUGGESTIONS'
+
+export const TIMELINE_INJECTION_WEIGHT_DEFAULT = 1
+export const TIMELINE_INJECTION_WEIGHT_MULTIPLIER = 100
+export const TIMELINE_INJECTION_WEIGHT_SUBTRACTOR = 0.005
+export const TIMELINE_INJECTION_WEIGHT_MIN = 0.01