fix: set editRequest attribute as necessary, allow users to edit their own pending requests, and show 'View Request' button on series pages (#1446)

* fix: set editRequest attribute for RequestModal

* fix: remove now-unneeded conditional

* fix(ui): only show 'View Request' for user's own requests if they don't have MANAGE_REQUESTS perm

* fix(ui): show edit button on request list for own requests & 'View Request' button on series pages

* fix(ui): do not show 'Request More' if user already has a pending request

* fix: address PR comments

* fix(lang): edit usercreatedfaileexisting string & generate translation key

* fix: users should always be able to view/edit their own requests even if their perms have changed

also fixed capitalization of 'Signing In...' string

src/i18n/globalMessages.ts

@@ -9,7 +9,7 @@ const globalMessages = defineMessages({
   requested: 'Requested',
   requesting: 'Requesting…',
   request: 'Request',
-  request4k: 'Request 4K',
+  request4k: 'Request in 4K',
   failed: 'Failed',
   pending: 'Pending',
   declined: 'Declined',