Y20210817-1030
On Linux / Mac SWT moves the default button to the right. Create Bug 575444 to add this to the SWT FAQ. This change considers this in the PlainMessageDialogTests Change-Id: I6df84e1560cd15fd7a698d4c3102e24880c2cb48 Signed-off-by: Lars Vogel <Lars.Vogel@vogella.com> Reviewed-on: https://git.eclipse.org/r/c/platform/eclipse.platform.ui/+/184117