Fix accessing calls

Some plugins need access to the handler (and rewriter) calls. One
example is the do plugin.

This adds some accessing methods to the callWriter objects, ensures
$calls can be acc

Fix accessing calls

Some plugins need access to the handler (and rewriter) calls. One
example is the do plugin.

This adds some accessing methods to the callWriter objects, ensures
$calls can be accessed and removes some duplicate code by introducing an
abstract base class.

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fix the case lookup table. #3113

This readds a whole bunch of conversions that for some reason got lost
in the refactoring. No idea what happened there.

some minor improvements for the writability checks

* handle is_writable for non-existing pages correctly
* Success and Fail are now color coded correctly

fixed message classes

In #3069 the internal structure of messages was accidentally changed to
be numeric. This reintroduces the proper string constants.

I thought about keeping the integers and do

fixed message classes

In #3069 the internal structure of messages was accidentally changed to
be numeric. This reintroduces the proper string constants.

I thought about keeping the integers and do the mapping in
html_msgarea() but some plugins rely on inspecting the global $MSG so I
don't want to change it.

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fix hierarchical breadcrumbs #3114

fix formatting errors in template.php

These were introduced in #2684

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FatalException: drop unused $status property

The property is never assigned

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Comments with altered files removed

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