Add pie and line chart tabs to query result preview

[eeriksp]

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[eeriksp]

@marksweb, thank you for amendments, they have all been incorporated now.
Anything else you would like to change?

[marksweb]

@eeriksp Just realised, this needs the setup.py updating to handle the optional dependencies added here.

There's a good example here; https://github.com/anymail/django-anymail/blob/main/setup.py#L62

At the moment we've got;

extras_require={
        "xls": [
            'xlsxwriter>=1.2.1'
        ]
    },

So this could go in with the feature name;

extras_require={
        "graphs": [
            'matplotlib<4',
            'seaborn<0.12'
        ]
        "xls": [
            'xlsxwriter>=1.2.1'
        ]
    },