XMLWorkspaceConfig - center and extent overrides

[adube]

#387 introduced setting the initial center/extent of the map using MapPanel widget options.

It would be nice to be able to override these in the workspace.

[adube]

r1280, featuring :

• new mappaneloptions node for the workspace tag that can be used to override any mappanel option
• that way, it can be used to set a different center/extent for a workspace by overriding the centerString and zoom or extentString mappanel options.
• the workspace widgets sample was updated to demonstrate that new feature inside one of its workspaces
• documentation added to the mappanel widget doc inside the 'initial map center/extent' topic

[adube]

The override doesn't work if the option value contains nodes. For example, this doesn't work :

<mappaneloptions>
  <centerString>1682372,220446</centerString> <!-- works -->
  <zoom>3</zoom> <!-- works -->
  <pageTitle> <!-- doesn't work -->
    <en_US>This is the WS_Toolbar workspace</en_US> 
    <fr_CA>Ceci est le workspace WS_Toolbar</fr_CA>
  </pageTitle>
</mappaneloptions>

[adube]

Fixed in r1310.