
**Apache Airflow version**:
2.0.1

**Environment**:

- **OS**: Linux Mint 19.2 
- **Kernel**: 5.5.0-050500-generic #202001262030 SMP Mon Jan 27 01:33:36 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux

**What happened**:

Seems that pagination doesn't work. I filter DAGs by tags and get too many results to get them at one page. When I click second page I'm redirected to the first one (actually, it doesn't matter if I click second, last or any other - I'm always getting redirected to the first one).

**What you expected to happen**:

I expect to be redirected to the correct page when I click number on the bottom of the page.

**How to reproduce it**:
1. Create a lot of DAGs with the same tag
2. Filter by tag
3. Go to the next page in the pagination bar

**Implementation example**:



```
from airflow import DAG
from airflow.utils.dates import days_ago
for i in range(200):
    name = 'test_dag_' + str(i)
    dag = DAG(
        dag_id=name,
        schedule_interval=None,
        start_date=days_ago(2),
        tags=['example1'],
    )
    globals()[name] = dag
```

tests/www/test_utils.py
from airflow.www.app import cached_app
        with cached_app(testing=True).test_request_context():
            html = str(utils.dag_link({'dag_id': '<a&1>', 'execution_date': datetime.now()}))
        assert '%3Ca%261%3E' in html
        assert '<a&1>' not in html
    def test_dag_link_when_dag_is_none(self):
        """Test that when there is no dag_id, dag_link does not contain hyperlink"""
        from airflow.www.app import cached_app
        with cached_app(testing=True).test_request_context():
            html = str(utils.dag_link({}))
        assert 'None' in html
        assert '<a href=' not in html
    def test_dag_run_link(self):
        from airflow.www.app import cached_app
        with cached_app(testing=True).test_request_context():
            html = str(
                utils.dag_run_link({'dag_id': '<a&1>', 'run_id': '<b2>', 'execution_date': datetime.now()})
            )
        assert '%3Ca%261%3E' in html
        assert '%3Cb2%3E' in html
        assert '<a&1>' not in html
        assert '<b2>' not in html
class TestAttrRenderer(unittest.TestCase):