[birt-dev] Checkin: Bugzilla#188283 - Bubbles should be z-sorted by size

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

- Summary:
Bubbles should be z-sorted by size in Bubble charts

-Bugzilla Bug (s) Resolved: 188283

- Description:
Added MarkerInstruction to sort Marker render event by marker size.
Refactored Clipping logic.

- 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/Area.java" "/org.eclipse.birt.chart.engine.extension/src/org/eclipse/birt/chart/render/Bubble.java"
"/org.eclipse.birt.chart.engine/src/org/eclipse/birt/chart/render/MarkerRenderer.java" "/org.eclipse.birt.chart.engine/src/org/eclipse/birt/chart/render/DeferredCache.java" "/org.eclipse.birt.chart.engine/src/org/eclipse/birt/chart/render/AxesRenderer.java"

- Files Added:
"/org.eclipse.birt.chart.engine/src/org/eclipse/birt/chart/event/MarkerInstruction.java"

- Files Deleted