[#8090] Display merge requests button in sidebar even if there are none for all forkable repos
[#8090] Display merge requests button in sidebar even if there are none for all forkable repos

apache/allura,apache/allura,heiths/allura,heiths/allura,heiths/allura,apache/allura,heiths/allura,heiths/allura,apache/allura,apache/allura