tmf: Add follow arrow forward and backward actions to time graph

tmf: Add follow arrow forward and backward actions to time graph

Also add these actions to the Control Flow view local tool bar.

Change-Id: Ied39dfb813f4dfd4ec7822754978283cbbcf6335
Signed-off-by: Patrick Tasse <patrick.tasse@gmail.com>
Reviewed-on: https://git.eclipse.org/r/15388
Tested-by: Hudson CI
Reviewed-by: Bernd Hufmann <bernd.hufmann@ericsson.com>
IP-Clean: Bernd Hufmann <bernd.hufmann@ericsson.com>
Tested-by: Bernd Hufmann <bernd.hufmann@ericsson.com>