Use pulls in commit graph unless pulls are disabled (#15734 & #15740 & #15774) (#15775)

* Commit Graph: Pull-Requests should not link to issues (#15734)

Use `/pulls` and simplify code.

* reverse #15734 partial and comment (#15740)

* reverse & comment

* Update templates/repo/graph/commits.tmpl

Co-authored-by: 6543 <6543@obermui.de>

Co-authored-by: zeripath <art27@cantab.net>

* Use pulls in commit graph unless pulls are disabled

Fix #15370

Signed-off-by: Andrew Thornton <art27@cantab.net>

Co-authored-by: KN4CK3R <KN4CK3R@users.noreply.github.com>
Co-authored-by: zeripath <art27@cantab.net>

templates/repo/graph/commits.tmpl

@@ -33,14 +33,9 @@
 						{{range $commit.Refs}}
 							{{$refGroup := .RefGroup}}
 							{{if eq $refGroup "pull"}}
-								{{if $.HidePRRefs}}
-									{{if (containGeneric $.SelectedBranches .Name) }}
-										<a class="ui labelled icon button basic tiny" href="{{$.RepoLink}}/issues/{{.ShortName|PathEscape}}">
-											{{svg "octicon-git-pull-request" 16 "mr-2"}}#{{.ShortName}}
-										</a>
-									{{end}}
-								{{else}}
-									<a class="ui labelled icon button basic tiny" href="{{$.RepoLink}}/issues/{{.ShortName|PathEscape}}">
+								{{if or (not $.HidePRRefs) (containGeneric $.SelectedBranches .Name)}}
+									<!-- it's intended to use issues not pulls, if it's a pull you will get redirected -->
+									<a class="ui labelled icon button basic tiny" href="{{$.RepoLink}}/{{if $.Repository.UnitEnabled $.UnitTypePullRequests}}pulls{{else}}issues{{end}}/{{.ShortName|PathEscape}}">
 										{{svg "octicon-git-pull-request" 16 "mr-2"}}#{{.ShortName}}
 									</a>
 								{{end}}