SourceCodeEditorZMI: Set Zope4 default ace editor indent size to 2.

7 jobs for master in 0 seconds
Status Job ID Name Coverage
  External
failed ERP5.CodingStyleTest-Master

00:53:00

passed ERP5.PerformanceTest-Master

00:26:58

passed ERP5.UnitTest-Master

01:27:02

failed ERP5.UnitTest-Zope2

02:17:13

passed SlapOS.Eggs.UnitTest-Master.Python2

00:13:39

passed SlapOS.Eggs.UnitTest-Master.Python3

00:15:12

passed Wendelin.UnitTest-Master

07:21:54