No direct search execution

Revert "Lazy search execution"

This reverts commit 95a8e37d986b141b2caee5b396741b93cd31c0e6.

Lazy search execution

Move search out of aggregation constructors. It should only be executed
before actual rendering, not e.g. on metadata run

�� Automatic code style fixes

Add anchor to agrregations and dynammic filters

Fixes #629

�� Automatic code style fixes

added classes config parameter

This allows users to set custom CSS classes on aggregations potentially
restyling them differently for different use cases.

This makes startScope and finishScope part

added classes config parameter

This allows users to set custom CSS classes on aggregations potentially
restyling them differently for different use cases.

This makes startScope and finishScope part of the public API of the
Aggregation class. It should no longer be called within render() but is
instead called outside.

This might potentially break plugins implementing their own
aggregations. Needs to be checked

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some streamlining for the aggregation classes

Have an abstract base class for aggregations to ensure proper
signatures, reuse more code from the table syntax

Manual code style adjustments

PHP code sniffer autofixes

refactoring names

To avoid confusion with the Lookup type, the three different ways of
accessing a schema have now the following names:

* page data - for revisioned struct data attached to a page
*

refactoring names

To avoid confusion with the Lookup type, the three different ways of
accessing a schema have now the following names:

* page data - for revisioned struct data attached to a page
* serial data - for an unrevisioned list of struct data attached to a
page
* global data - for an unrevisioned list of struct data not attached to
any page (formaly known as lookup schema)

The editor mechanism used for serial and global data is now called
AggregationEditor

Some reference to lookup schemas is still in the bureaucracy support
part.

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