Creating a large image creates a large dialog that goes off screen

[Jussi Lind]

Creating an image that is larger than the screen size will literally create a huge dialog of that image size and it will go off screen.

The dialog size should be limited to the screen size and scroll bars should be enabled.

ProblemType: Bug
DistroRelease: Ubuntu 19.04
Package: gimp 2.10.8-2
ProcVersionSignature: Ubuntu 5.0.0-36.39-generic 5.0.21
Uname: Linux 5.0.0-36-generic x86_64
ApportVersion: 2.20.10-0ubuntu27.3
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Sat Dec 14 14:22:59 2019
InstallationDate: Installed on 2016-09-13 (1187 days ago)
InstallationMedia: Ubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719)
SourcePackage: gimp
UpgradeStatus: Upgraded to disco on 2019-04-19 (238 days ago)