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/components/Login/LocalLogin.tsx

@@ -13,7 +13,7 @@ const messages = defineMessages({
   validationemailrequired: 'You must provide a valid email address',
   validationpasswordrequired: 'You must provide a password',
   loginerror: 'Something went wrong while trying to sign in.',
-  signingin: 'Signing in…',
+  signingin: 'Signing In…',
   signin: 'Sign In',
   forgotpassword: 'Forgot Password?',
 });