Show always repo count in header (#26842)

A few pages don't load the repo count of an user/org, so it is not shown
in the header. This happens mostly on org pages, but the package
settings applies to the user page as well.

Before:
![Screenshot 2023-08-31 at 12-45-36 Gitea Git with a cup of
tea](https://github.com/go-gitea/gitea/assets/15185051/14a59998-2cf9-4771-82f4-5d1d6fcb31f4)

After:

![grafik](https://github.com/go-gitea/gitea/assets/15185051/ff055aa0-7cde-49be-9522-437bf970be1d)


Seen on #26826
Regression of #25928

routers/web/org/setting_oauth2.go

@@ -11,6 +11,7 @@ import (
 	"code.gitea.io/gitea/modules/base"
 	"code.gitea.io/gitea/modules/context"
 	"code.gitea.io/gitea/modules/setting"
+	shared_user "code.gitea.io/gitea/routers/web/shared/user"
 	user_setting "code.gitea.io/gitea/routers/web/user/setting"
 )
 
@@ -41,6 +42,12 @@ func Applications(ctx *context.Context) {
 	}
 	ctx.Data["Applications"] = apps
 
+	err = shared_user.LoadHeaderCount(ctx)
+	if err != nil {
+		ctx.ServerError("LoadHeaderCount", err)
+		return
+	}
+
 	ctx.HTML(http.StatusOK, tplSettingsApplications)
 }