Backport #16586
There is a mistake in #16319 and #16487 which means that the first time
a wiki page is created a 500 is reported because the `master` branch is
not in existence in that wiki yet.
This PR simply checks for this error and returns not found.
Fix#16584
Signed-off-by: Andrew Thornton <art27@cantab.net>
* Decouple TestAction_GetRepoLink and TestSizedAvatarLink.
* Load database for TestCheckGPGUserEmail.
* Load database for TestMakeIDsFromAPIAssigneesToAdd.
* Load database for TestGetUserIDsByNames and TestGetMaileableUsersByIDs.
* Load database for TestUser_ToUser.
* Load database for TestRepository_EditWikiPage.
* Include AppSubURL in test.
* Prevent panic with empty slice.
Co-authored-by: zeripath <art27@cantab.net>
Co-authored-by: techknowlogick <techknowlogick@gitea.io>
