Allow Font Size Customization for Relative Date Slicer Dropdown

Currently, the Relative Date Slicer in Power BI allows adjusting the font size for slicer values and titles, but the dropdown options (e.g., “Last,” “Next,” “This” and the time units) remain at a fixed size. This creates a visual inconsistency and impacts accessibility and user experience, especially in dashboards designed for large screens or executive reports.