Is there any way for single blox button to do 2 different actions ?

Wojtek 

I have removed 'dashboard filter last 8 days' button and kept only 'Day Granularity' button. And updated your 'switchPanelItems' script to filter 2nd action ( last 8 days dashboard filter ) as well

Let me know if this is what you wanted

Blox changes : 

Note : Please change the content under 'dateFilters' section to match with your dashboard date filter metadata

 {
            "type": "switchPanelItems",
            "title": "Day Granularity",
            "style": {
                "width": "150px",
                "background-color": "#a6a6a6"
            },
            "data": {
                "actionDetails": [
                    {
                        "targetWidget": "628f953a600ec2002b8c2580",
                        "sourcePanel": "0",
                        "sourceItem": "0",
                        "destPanel": "0",
                        "destItem": "0",
                        "dimName": "Date"
                    },
                    {
                        "targetWidget": "628f900a600ec2002b8c2571",
                        "sourcePanel": "0",
                        "sourceItem": "0",
                        "destPanel": "0",
                        "destItem": "0",
                        "dimName": "Date"
                    }
                ],
                "dateFilters": {
                    "dim": "[DIM DATE.Date (Calendar)]",
                    "title": "History",
                    "column": "Date",
                    "table": "DIM DATE",
                    "datatype": "datetime",
                    "level": "days",
                    "filter": {
                        "last": {
                            "count": 8,
                            "offset": 0
                        }
                    }
                }
            }
        }

'switchPanelItems' custom script changes : 

payload.data.actionDetails.forEach(function (a) {
    var w = payload.widget.dashboard.widgets.$$widgets.filter(i => i.oid == a.targetWidget)[0];
    w.metadata.panels[a.destPanel].items[a.destItem].jaql = JSON.parse(JSON.stringify(payload.widget.metadata.panels[a.sourcePanel].items[a.sourceItem].jaql));
    if (typeof a.dimName == 'string') {
        w.metadata.panels[a.destPanel].items[a.destItem].jaql.title = a.dimName;
    };
    w.changesMade();
    w.refresh();
});

// Dashboard date filter
const datefilter = payload.data.dateFilters

prism.activeDashboard.filters.update(
    {
        'jaql': datefilter
    },
    {
        'save': true,
        'refresh': true,
        'changesMade': true
    }
)