#1 Column Sort indicator & tree movable columns

[Rutger Ovidius]

They didn't make it into swt 3.1 final, but are in cvs.

--
Sort indicator on Table and Tree columns:

https://bugs.eclipse.org/bugs/show_bug.cgi?id=43192

--
Make TreeColumns movable just like TableColumns
already are:

https://bugs.eclipse.org/bugs/show_bug.cgi?id=86018