[birt-dev] Checkin: fix 121275 Edit Group dialog does not let me insert

["Yuejie Chen" <yuejie.chen@xxxxxxxxxxx>]

- Summary: fix 121275
Edit Group dialog does not let me insert page breaks based on group key

- Bugzilla Bug (s) Resolved:
121275
- Description:
Change UI with the mockup suggest.

- Tests Description:
Manual
- Notes to Build Team:

- Notes to Developers:

- Notes to QA:
Update relative test cases.
- Notes to Documentation:

- Files Edited:

/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/internal/ui/views/attributes/page/ListingSectionPage.java
/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/ui/dialogs/GroupDialog.java

/org.eclipse.birt.report.designer.core/src/org/eclipse/birt/report/designer/nls/messages.properties

- Files Added:

<<Your Signature Here>>