[birt-dev] CheckIn: Fix [Bugzilla] 126398:unwanted error message

["Xiong Zhang" <xiong.zhang@xxxxxxxxxxx>]

-Summary:
unwanted error message

- Bugzilla Bug (s) Resolved:
126398

- Description:
In his dialog,the name can't be empty and it can't be duplicate.
We can tell the user to specify a name without an error image when the dialog
is shown, when the specified name is duplicated, we can tell him the name has
been used with an error image.

- Tests Description:

- Notes to Build Team:

- Notes to Developers:

- Notes to QA:

- Notes to Documentation:

- Files Added:

- Files Edited:

/org.eclipse.birt.report.designer.core/src/org/eclipse/birt/report/designer/nls/messages.properties
/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/internal/ui/dialogs/UserPropertyBuilder.java