Not fully support MXML file

[GoogleCodeExporter]

What steps will reproduce the problem?
  1. Open a MXML file (sample.MXML) and add an issue at line #10.
  2. Close the Eclipse and reopen the same project.
  3. Double-click the added issue in Review-Table.

What is the expected output? What do you see instead?
  -- step 1
  EXPECTED: A purple icon is displayed on the left side of Editor.
  RESULT:   No icons.

  -- step 3
  EXPECTED: The file sample.MXML is opened and jump to line #10.
  RESULT:   The file sample.MXML is opened and jump to the first line.

What version of the product are you using? On what operating system?

  VERSION:Eclipse 3.3.2 + Flex Builder Plug-in 3.0 + Jupiter 3.5

If applicable, what editor does the problem occur in (Jupiter is tested
against the 'Eclipse for RCP/Plug-in Developers' so the editors may vary)?
  Eclipse classic.

Please provide any additional information below.
  1. Everything is fine in AS file.
  2. MXML file is a kind of XML file.

Thanks.

Original issue reported on code.google.com by AllenLee.lz on 3 Aug 2009 at 3:30

[GoogleCodeExporter]

I'm wondering if this editor extends the Eclipse XML editor.  That editor 
results in the same behavior which 
makes me think they are somehow related.

Original comment by jsakuda on 3 Aug 2009 at 6:02

[GoogleCodeExporter]

I guess so. As MXML complies with XML syntax, there is no need to build a new 
one
from scratch.

Original comment by AllenLee.lz on 3 Aug 2009 at 6:10

[GoogleCodeExporter]

Original comment by jsakuda on 3 Aug 2009 at 9:48