Tooltip: implemented api method for manually refreshing the tooltip (in case of content change)
Tooltip: reworked hover timers, fixed async flickering
Tooltip: added basic show/hide/toggle methods to api
Tooltip: added fadeout effect to tooltip (turns out visibility is 'animatable', whodathunkit)
Tooltip: minor bugfix where hovering onto tooltips when trigger style was 'hover' set the target element as the tooltip itself