Improve the default layout of the debug perspective

[merks]

Generally the first I do in every IDE when I first use the debug perspective is to change the area on the right to cover the entire height of the window. That's because generally like to see more of the variables and like to see more of the toString values of those variables. This could be change in .DebugPerspectiveFactory.createInitialLayout(IPageLayout)

Currently this is the default layout

This is the propose new default layout:

[vogella]

+1, great to see these requests to improve the default settings of our IDE