Missing rev parameter for URL display in web interface

[stoecker]

Issue Description

When viewing and old revision the link to file display is missing the revision parameter.

Expected Result

Link should work

How to Reproduce

1. Go to 'https://build.opensuse.org/package/show/Application:Geo/postgis?rev=96'
2. Click on 'patch-tests-results.patch' or the download button
3. See error

Further Information

• The resulting link is https://build.opensuse.org/projects/Application:Geo/packages/postgis/files/patch-tests-results.patch?expand=1, but the correct address is https://build.opensuse.org/projects/Application:Geo/packages/postgis/files/patch-tests-results.patch?expand=1&rev=96

For old revisions all links also must have the revision in the URL.

P.S. For display of old revisions the "Delete file" action makes no sense and should be removed. The link contains the rev parameter but it seems it tries to delete the file in the current revision nonetheless, which is plan wrong as well.