[birt-dev] Checkin: Bugzilla#190940 - Gantt chart in chart build will us

["Yulin Wang" <yulin.wang@xxxxxxxxxxx>]

- Summary:
Gantt chart in chart build will use the sample data until set data for Task Label [0001]

- Bugzilla Bug (s) Resolved: 190940

- Description:
Fixed by only checking the valid query before live preview is enabled.
Refactored UI by removing duplicate code as well.

- Tests Description: Manual Test

- Notes to Build Team: N/A

- Notes to Developers: N/A

- Notes to QA: N/A

- Notes to Documentation: N/A

- Files Edited:

/org.eclipse.birt.chart.reportitem.ui/src/org/eclipse/birt/chart/reportitem/ui/QueryUIHelper.java
/org.eclipse.birt.chart.ui.extension/src/org/eclipse/birt/chart/ui/swt/wizard/data/SelectDataDynamicArea.java
/org.eclipse.birt.chart.ui.extension/src/org/eclipse/birt/chart/ui/swt/wizard/format/series/SeriesYSheetImpl.java
/org.eclipse.birt.chart.ui/src/org/eclipse/birt/chart/ui/util/ChartUIUtil.java

- Files Added:

- Files Deleted