[DASHBOARDS] - Add relative date

[StephanieJoly4]

Scope & Context

Current behavior

Current filters available to filter on dates in dashboards

Current filters available to filter on dates in views

Expected behavior

Allow to filter based on relative dates while filtering on dashboards. This is very helpful to have dashboards to review the current quarter performance, the calls made last week by the Sales team, the deals closed last month and so on, without expecting the user to manually update the filter every time he/she needs it.