Respect UI.ExploreDefaultSort setting again (#32357)

fix regression of https://github.com/go-gitea/gitea/pull/29430

---
*Sponsored by Kithara Software GmbH*

routers/web/explore/org.go

@@ -9,6 +9,7 @@ import (
 	"code.gitea.io/gitea/modules/container"
 	"code.gitea.io/gitea/modules/setting"
 	"code.gitea.io/gitea/modules/structs"
+	"code.gitea.io/gitea/modules/util"
 	"code.gitea.io/gitea/services/context"
 )
 
@@ -39,7 +40,7 @@ func Organizations(ctx *context.Context) {
 	)
 	sortOrder := ctx.FormString("sort")
 	if sortOrder == "" {
-		sortOrder = "newest"
+		sortOrder = util.Iif(supportedSortOrders.Contains(setting.UI.ExploreDefaultSort), setting.UI.ExploreDefaultSort, "newest")
 		ctx.SetFormString("sort", sortOrder)
 	}
 

routers/web/explore/user.go

@@ -16,6 +16,7 @@ import (
 	"code.gitea.io/gitea/modules/setting"
 	"code.gitea.io/gitea/modules/sitemap"
 	"code.gitea.io/gitea/modules/structs"
+	"code.gitea.io/gitea/modules/util"
 	"code.gitea.io/gitea/services/context"
 )
 
@@ -149,7 +150,7 @@ func Users(ctx *context.Context) {
 	)
 	sortOrder := ctx.FormString("sort")
 	if sortOrder == "" {
-		sortOrder = "newest"
+		sortOrder = util.Iif(supportedSortOrders.Contains(setting.UI.ExploreDefaultSort), setting.UI.ExploreDefaultSort, "newest")
 		ctx.SetFormString("sort", sortOrder)
 	}