Quick and easy improvements to graph plotting

[Nick Draper]

1. Turn antialiasing on
2. Turn tick marks inside the axes
3. turn axes on all round (no labels on top or right)
4. Change the background on the legend to opaque

[Nick Draper]

This has been done using a one time change to the preferences.

[Nick Draper]

re #8791 some basic plotting improvements

Changeset: b6fdc592a6e340956dc40f1dc62bba385a266d6c

[Nick Draper]

This is waiting on a conflict to be resolved in develop before we can merge but otherwise it is ready

To Test: BEFORE MERGING

• Look at the defaults in a plotted 1D graph

After merging

1. Look at the properties after starting mantidplot
2. see the points in the ticket and the settings should now refelct that.
3. Plot a graph this should fit the settings (and the background of the legend should be opaque - no setting for this).
4. Change a setting (such as antialiasing), exit and restart mantidplot - the change should be saved

[Nick Draper]

Spotted that the tick marks are present for colour map plots, reopened

[Nick Draper]

Further info for tester:

if you want to force the update to preferences again, and don't feel like removing all your settings, this is the key you need to delete. (either in regedit for windows, or ini files)

HKEY_CURRENT_USER\Software\Mantid\MantidPlot\2DPlots\UpdateForPlotImprovements1

[Nick Draper]

re #8791 fixed tick direction on 2D graphs

Changeset: a6fdb90081775e6b37df5c8950271307d50bc69d

[Samuel Jackson]

Merge remote-tracking branch 'origin/feature/8791_Plot_improvements'

Full changeset: ​073b5b0035ccdb799d136f4bea7e2fdd2c569374

[Samuel Jackson]

Check that the new settings are applied on start up. I tried changing the defaults, closing Mantid and reopening and checking that my changes were still applied. The only issue I have is that antialiasing is overridden by the default option of the plot properties dialog, but this will be dealt with in ticket #8805.

[Stuart Campbell]

This ticket has been transferred to github issue ​9635