[birt-dev]CheckIn: Fix Bugzilla Bug ---147410 regression]Drop doesn't wo

["Wei Yan" <wyan@xxxxxxxxxxx>]

Title: [birt-dev]CheckIn: Fix Bugzilla Bug ---147410 regression]Drop doesn't work in table group cell.

- Summary:

- Bugzilla Bug (s) Resolved:
147410 regression]Drop doesn't work in table group cell.
- Description:
Fix drop feature in Web-viewer.

- Tests Description  :
Manual test

- Notes to Build Team:

- Notes to Developers:

- Notes to QA:  
 
- Notes to Documentation:  

- Files Edited:
cvs ci -m "fix drop in web-viewer" -l "/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/layout/html/HTMLTableBandLM.java" "/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/layout/html/HTMLTableLayoutEmitter.java"

- Files Added:

- Files Deleted

-Wei Yan