Find a way to allow c:if work with partial state saving enabled
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                 Key: MYFACES-2483
                 URL: https://issues.apache.org/jira/browse/MYFACES-2483
             Project: MyFaces Core
          Issue Type: Task
          Components: JSR-314
            Reporter: Leonardo Uribe


This one is difficult to solve but I still think it is possible.

It was explored trying to solve MYFACES-2428, and it seems ri is trying to do 
something about it too on:

https://javaserverfaces.dev.java.net/issues/show_bug.cgi?id=1408

and

https://javaserverfaces.dev.java.net/issues/show_bug.cgi?id=1313

One strategy to solve this one is this:

1. Mark the parent component containing c:if to not save it partially.
2. Do not execute c:if on postback and partial state saving enabled.

In theory, the parent component should be restored fully from saved state.

Note that things like:

<c:if>....
   <p>Some markup</p>
<c:if>

is just invalid. It is expected that c:if only contains components with state.

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