erp5_web_project_ui: get project home page by publication section preference

- use global preference to get publication section value
- test updated
8 jobs for master in 0 seconds
Status Job ID Name Coverage
  External
passed ERP5.CodingStyleTest-Master

01:13:59

passed ERP5.PerformanceTest-Master

00:32:13

failed ERP5.UnitTest-Master

02:03:29

passed SlapOS.Eggs.UnitTest-Master.Python2

00:19:43

passed SlapOS.Eggs.UnitTest-Master.Python3

00:16:34

passed SlapOS.Eggs.UnitTest-Master.Python2

00:18:24

passed SlapOS.Eggs.UnitTest-Master.Python2

00:21:15

passed SlapOS.Eggs.UnitTest-Master.Python3

00:16:33