Fix Dashboard Widget often Hidden by Vertical Scrollbar

[Mikerion]

Closes #3256

[buchen]

Hi @Mikerion,

actually, looking at the layout, it makes the columns to small because it is subtracting on SPACING too much.

Now, we can throw in another 10 pixels, but I am not sure how this fixes the problem described in #3256.

There is code that - on Windows - adds additional space to make room for the vertical scroll bar. I think what we need to investigate is why that code does not work (or does not in all cases).

portfolio/name.abuchen.portfolio.ui/src/name/abuchen/portfolio/ui/views/dashboard/DashboardView.java

Lines 498 to 504 in 3ec2c69

	// On windows only, we do not have an overlay scrollbar and hence have
	// to reduce the visible area to make room for the vertical scrollbar
	if (Platform.OS_WIN32.equals(Platform.getOS()) && size.y > clientArea.height)
	{
	int width = clientArea.width - scrolledComposite.getVerticalBar().getSize().x;
	size = container.computeSize(width, SWT.DEFAULT);
	}