Show configured GitLab name on Account page

This includes the chosen GitLab display name in the button text.

account.go

@@ -1076,6 +1076,7 @@ func viewSettings(app *App, u *User, w http.ResponseWriter, r *http.Request) err
 		OauthSlack        bool
 		OauthWriteAs      bool
 		OauthGitLab       bool
+		GitLabDisplayName string
 	}{
 		UserPage:          NewUserPage(app, r, u, "Account Settings", flashes),
 		Email:             fullUser.EmailClear(app.keys),
@@ -1087,6 +1088,7 @@ func viewSettings(app *App, u *User, w http.ResponseWriter, r *http.Request) err
 		OauthSlack:        enableOauthSlack,
 		OauthWriteAs:      enableOauthWriteAs,
 		OauthGitLab:       enableOauthGitLab,
+		GitLabDisplayName: config.OrDefaultString(app.Config().GitlabOauth.DisplayName, gitlabDisplayName),
 	}
 
 	showUserPage(w, "settings", obj)

templates/user/settings.tmpl

@@ -93,7 +93,7 @@ h3 { font-weight: normal; }
                 <a class="btn cta loginbtn" id="writeas-login" href="/oauth/write.as?attach=t">Link your <strong>Write.as</strong> account.</a>
             {{ end }}
             {{ if .OauthGitLab }}
-                <a class="btn cta loginbtn" id="gitlab-login" href="/oauth/gitlab?attach=t">Link your <strong>GitLab</strong> account.</a>
+                <a class="btn cta loginbtn" id="gitlab-login" href="/oauth/gitlab?attach=t">Link your <strong>{{.GitLabDisplayName}}</strong> account</a>
             {{ end }}
             </p>
         {{ end }}