feat: Memberships (#1032)

* WIP

* feat: Add collection.memberships endpoint

* feat: Add ability to filter collection.memberships with query

* WIP

* Merge stashed work

* feat: Add ability to filter memberships by permission

* continued refactoring

* paginated list component

* Collection member management

* fix: Incorrect policy data sent down after collection.update

* Reduce duplication, add empty state

* cleanup

* fix: Modal close should be a real button

* fix: Allow opening edit from modal

* fix: remove unused methods

* test: fix

* Passing test suite

* Refactor

* fix: Flow UI errors

* test: Add collections.update tests

* lint

* test: moar tests

* fix: Missing scopes, more missing tests

* fix: Handle collection privacy change over socket

* fix: More membership scopes

* fix: view endpoint permissions

* fix: respond to privacy change on socket event

* policy driven menus

* fix: share endpoint policies

* chore: Use policies to drive documents UI

* alignment

* fix: Header height

* fix: Correct behavior when collection becomes private

* fix: Header height for read-only collection

* send id's over socket instead of serialized objects

* fix: Remote policy change

* fix: reduce collection fetching

* More websocket efficiencies

* fix: Document collection pinning

* fix: Restored ability to edit drafts
fix: Removed ability to star drafts

* fix: Require write permissions to pin doc to collection

* fix: Header title overlaying document actions at small screen sizes

* fix: Jank on load caused by previous commit

* fix: Double collection fetch post-publish

* fix: Hide publish button if draft is in no longer accessible collection

* fix: Always allow deleting drafts
fix: Improved handling of deleted documents

* feat: Show collections in drafts view
feat: Show more obvious 'draft' badge on documents

* fix: incorrect policies after publish to private collection

* fix: Duplicating a draft publishes it

app/stores/BaseStore.js

@@ -145,13 +145,18 @@ export default class BaseStore<T: BaseModel> {
 
       this.addPolicies(res.policies);
       return this.add(res.data);
+    } catch (err) {
+      if (err.statusCode === 403) {
+        this.remove(id);
+      }
+      throw err;
     } finally {
       this.isFetching = false;
     }
   }
 
   @action
-  async fetchPage(params: ?PaginationParams): Promise<*> {
+  fetchPage = async (params: ?PaginationParams): Promise<*> => {
     if (!this.actions.includes('list')) {
       throw new Error(`Cannot list ${this.modelName}`);
     }
@@ -171,7 +176,7 @@ export default class BaseStore<T: BaseModel> {
     } finally {
       this.isFetching = false;
     }
-  }
+  };
 
   @computed
   get orderedData(): T[] {