### 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)

with mock.patch("airflow.settings.DASHBOARD_UIALERTS", [flash_message]):
        resp = request.getfixturevalue(client).get("home", follow_redirects=True)
    if expected:
        check_content_in_response(flash_message.message, resp)
    else:
        check_content_not_in_response(flash_message.message, resp)
def test_dashboard_flash_messages_many(user_client):
    messages = [
        UIAlert("hello world"),
        UIAlert("im_not_here", roles=["Admin"]),
        UIAlert("_hello_world_"),
    ]
    with mock.patch("airflow.settings.DASHBOARD_UIALERTS", messages):
        resp = user_client.get("home", follow_redirects=True)
    check_content_in_response("hello world", resp)
    check_content_not_in_response("im_not_here", resp)
    check_content_in_response("_hello_world_", resp)
def test_dashboard_flash_messages_markup(user_client):
    link = '<a href="http://example.com">hello world</a>'
    user_input = markupsafe.Markup("Hello <em>%s</em>") % ("foo&bar",)
    messages = [
        UIAlert(link, html=True),
        UIAlert(user_input),
    ]
    with mock.patch("airflow.settings.DASHBOARD_UIALERTS", messages):
        resp = user_client.get("home", follow_redirects=True)
    check_content_in_response(link, resp)
    check_content_in_response(user_input, resp)
def test_dashboard_flash_messages_type(user_client):