tmf: Support drag zoom in histogram

tmf: Support drag zoom in histogram

- Right button drag is used to select a new zoom window in both
histograms
- Shift-right button drag or click is used to modify the zoom window in
full range histogram
- Zoom is cancelled if the selected range duration is zero
- New time range is propagated when the mouse button is released
- Move draw time range window method to base class

Change-Id: If46c1edd5c8f67a1b48ebc2ebbe2527613ba927c
Signed-off-by: Patrick Tasse <patrick.tasse@gmail.com>
Reviewed-on: https://git.eclipse.org/r/18310
Tested-by: Hudson CI
Reviewed-by: Matthew Khouzam <matthew.khouzam@ericsson.com>
IP-Clean: Matthew Khouzam <matthew.khouzam@ericsson.com>
Tested-by: Matthew Khouzam <matthew.khouzam@ericsson.com>
Reviewed-by: Etienne Bergeron <etienne.bergeron@gmail.com>
Tested-by: Marc-Andre Laperle <marc-andre.laperle@ericsson.com>