RE 6838 Add pointed at table to MantidEV

Added an extra tab with a Table to display info.
Added (temporary?) widgets to allow the user to
specify a Q-point.
Info about the specified Q point is now displayed in
the table.  Must still hook up to notification service.
refs #6838
RE 6838 Add table to display pointed at info to MantidEV

The user specified Q vector is now passed through the
notification service to get the values to display in the
table.

Refs #6838