Add action hooks for touch/tap events

[jbilcke-hf]

Context

Currently when using Clapper from some tablets the touch events won't work,
that is because clapper currently expects pointer events (instead of touch/tap events)

Solution

Add additional callbacks to better support tablets

[jbilcke-hf]

I have started to look into this, the top timeline (minimap) should be fixed now on mobile

for the timeline itself it looks like it doesn't work yet on mobile, possibly because we inherit from MapControls (which inherits from OrbitControls) and those need further overrides