Revert "VersionComparator doesn't need an own thread (and is now called after the question about online checks to the user)."
Actually it should have it's own thread - otherwise it is executed on the EDT and blocks the start-up of the GUI.

This reverts commit ab63cc1b18fb6ba37656b6d570099ab0db077650.
Fixed: Some matrices were completely grayed out although only the diagonal was not editable.
Merge branch 'pre-R3' of ssh://github.com/kornl/gMCP into pre-R3
We always use correlation matrices with diagonal equal to 1.
If no matrix is created, jrbRCorrelation is not selected.
Changed unclear label of Simes test and added info dialog.
Updated screenshot: Bonferroni/parametric/Simes.
Merge branch 'power' into pre-R3