[birt-dev] Checkin: Bugzilla#188307 - Tube and Cone should have default

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

- Summary:
Tube and Cone should have default gradient to give some depth effect

- Bugzilla Bug (s) Resolved: 188307

- Description:
Uses converted Gradient color to render Tube/Cone chart to take a better depth effect.
Fixed the Outline bug when selecting Auto color in Riser outline with Gradient color in Series Palette.

- 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.engine.extension/src/org/eclipse/birt/chart/render/Bar.java
/org.eclipse.birt.chart.ui.extension/src/org/eclipse/birt/chart/ui/swt/composites/GradientEditorDialog.java

- Files Added:

/org.eclipse.birt.chart.engine/src/org/eclipse/birt/chart/util/FillUtil.java

- Files Deleted