Don't snap to task when tapping task icon in overview grid

- Open task menu directly instead of snapping to task, as there are spaces to do so unlike small screen

Fix: 201428316
Test: Tap task icon with clear all button shown in overview grid, no snapping
Test: Tap task icon with clear all button shown in non-grid overview, snapped to last task
Change-Id: Ief79f7c758c4109e5c7722b2f35647db98a9f05c