dragRemove: added: new remove_mode 'dragRemove' w/ optional param 'drag_width_divisor for non-kinetic (no fling) left / right swipe deletion. For more controlled deletion.
dragRemove: config mission fragment to use drag vs fling remove
Merge pull request #313 from bob01/dragsortlistview_drag_remove

MissionList: Further reduce the chance of unintentionally deleting waypoints - dragRemove