Authenticated Media Support (#51)

* Fix AvatarField to work with authenticated media

* Fix ViewMediaButton to work for user's media tab and reported events

* remove console.log

* cleanup AvatarField

* use correct thumbnail size

* fix AvatarField.test

* ignore postgres data for watchman

* fix new avatar preview

* watchman should ignore testdata completely, instead of specific subdirs

* update README

* change user's media icon in sidebar - use the same icon as the media tab

* Add preview for user media files if mimeType is image/*

* Add new line in user media Dialog

README.md

@@ -61,6 +61,7 @@ The following changes are already implemented:
 * [Restrict actions on specific users](https://github.com/etkecc/synapse-admin/pull/42)
 * [Add `Contact support` menu item](https://github.com/etkecc/synapse-admin/pull/45)
 * [Provide options to delete media and redact events on user erase](https://github.com/etkecc/synapse-admin/pull/49)
+* [Authenticated Media support](https://github.com/etkecc/synapse-admin/pull/51)
 
 _the list will be updated as new changes are added_