### Apache Airflow version

2.3.3 (latest released)

### What happened

An URL I saved in the past, `https://astronomer.astronomer.run/dx4o2568/home?tags=test`,  has the tag field in the query parameter though I was not aware of this. When I clicked on the URL, I was confused because I did not see any DAGs when I should have a bunch.

After closer inspection, I realized that the URL has the tag field in the query parameter but then noticed that the tag box in the Airflow UI wasn't properly populated.

![screen_shot_2022-07-12_at_8 11 07_am](https://user-images.githubusercontent.com/5952735/182496710-601b4a98-aacb-4482-bb9f-bb3fdf9e265f.png)


### What you think should happen instead

When I clicked on the URL, the tag box should have been populated with the strings in the URL.

### How to reproduce

Start an Airflow deployment with some DAGs and add the tag query parameter. More specifically, it has to be a tag that is not used by any DAG.

### Operating System

N/A

### Versions of Apache Airflow Providers

_No response_

### Deployment

Astronomer

### Deployment details

_No response_

### Anything else

_No response_

### Are you willing to submit PR?

- [X] Yes I am willing to submit a PR!

### Code of Conduct

- [X] I agree to follow this project's [Code of Conduct](https://github.com/apache/airflow/blob/main/CODE_OF_CONDUCT.md)

#
#
from __future__ import annotations
import os
from unittest import mock
import flask
import markupsafe
import pytest
from airflow.dag_processing.processor import DagFileProcessor
from airflow.security import permissions
from airflow.utils.session import create_session
from airflow.utils.state import State
from airflow.www.utils import UIAlert
from airflow.www.views import FILTER_STATUS_COOKIE, FILTER_TAGS_COOKIE
from tests.test_utils.api_connexion_utils import create_user
from tests.test_utils.db import clear_db_dags, clear_db_import_errors, clear_db_serialized_dags
from tests.test_utils.www import check_content_in_response, check_content_not_in_response, client_with_login
def clean_db():