Changes

tmf.ui: One-click Marker to zoom range

Right clicking on the marker axis sets the zoom
range to that marker. This is useful for right clicking
on a frame (e.g. video games/video playback) and 
looking at the results in the density view.

[Added] Right-click on marker axis zooms to it

Change-Id: Id2b5c4325d1b50520315baa8c3a31ae0a05cf0f8
Signed-off-by: Matthew Khouzam <matthew.khouzam@ericsson.com>
Reviewed-on: https://git.eclipse.org/r/c/tracecompass/org.eclipse.tracecompass/+/199826
Tested-by: Trace Compass Bot <tracecompass-bot@eclipse.org>
Tested-by: Patrick Tasse <patrick.tasse@gmail.com>
Reviewed-by: Patrick Tasse <patrick.tasse@gmail.com>