
**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
```

airflow/www/utils.py
"""Generates a URL to the Graph View for a TaskInstance."""
    dag_id = attr.get('dag_id')
    task_id = attr.get('task_id')
    execution_date = attr.get('execution_date')
    url = url_for('Airflow.task', dag_id=dag_id, task_id=task_id, execution_date=execution_date.isoformat())
    url_root = url_for(
        'Airflow.graph', dag_id=dag_id, root=task_id, execution_date=execution_date.isoformat()
    )
    return Markup(  
        """
        <span style="white-space: nowrap;">
        <a href="{url}">{task_id}</a>
        <a href="{url_root}" title="Filter on this task and upstream">
        <span class="material-icons" style="margin-left:0;"
            aria-hidden="true">filter_alt</span>
        </a>
        </span>
        """
    ).format(url=url, task_id=task_id, url_root=url_root)
def state_token(state):
    """Returns a formatted string with HTML for a given State"""
    color = State.color(state)
    fg_color = State.color_fg(state)
    return Markup(  
        """
        <span class="label" style="color:{fg_color}; background-color:{color};"
            title="Current State: {state}">{state}</span>
        """
    ).format(color=color, state=state, fg_color=fg_color)
def state_f(attr):