Bug 574942 - Undo, Line End, Line Start... actions loose carets with block/multiple selection

- Maintain carets when undoing with active multiple carets

Change-Id: Ib61b9c2df27e4f8060b07548dcbcf1c065602472
Reviewed-on: https://git.eclipse.org/r/c/platform/eclipse.platform.text/+/191798
Tested-by: Platform Bot <platform-bot@eclipse.org>
Reviewed-by: Mickael Istria <mistria@redhat.com>
2 files changed