fix undefined array key warning when sorting by a hidden column

Reading $tables[$col] in the hidden-column sort branch raised an
E_WARNING under PHP 8 whenever the key was absent, which is exactly
t

fix undefined array key warning when sorting by a hidden column

Reading $tables[$col] in the hidden-column sort branch raised an
E_WARNING under PHP 8 whenever the key was absent, which is exactly
this branch's case. Guard the access with isset() to match the
sibling check in the column-select loop.

fixes #238

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Manual code style fixes

Semi-automatic code style fixes

Another adjustment for the pre-escaped filter values

use new SQLiteDB class

This had many changes in how data is quoted in the SQL strings. The SQL
building code is an absolute mess and test coverage is super spotty. So
it's not 100% clear that this c

use new SQLiteDB class

This had many changes in how data is quoted in the SQL strings. The SQL
building code is an absolute mess and test coverage is super spotty. So
it's not 100% clear that this commit is fully correct.

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use custom GROUP_CONCAT_DISTINCT method

replace obsolete utf8_ calls

automattic reformatting

Update tests

Multivalue dropdowns

Restore Hogfather compatibility

Simplify some form element creation

Replace old form object

fix PHP 7.2 warnings about Countable

fix curly braces string position access

cleanup some requires and if defined DOKU_INC

fix: adjust to new startSectionEdit signature

The signature of startSectionEdit was changed in splitbrain/dokuwiki#2220
in a non backwards compatible way. This adjusts for that change in a way
that

fix: adjust to new startSectionEdit signature

The signature of startSectionEdit was changed in splitbrain/dokuwiki#2220
in a non backwards compatible way. This adjusts for that change in a way
that should still work for pre-Greebo versions.

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refactor: remove old (~2010) compatiblity check

The startSectionEdit/finishSectionEdit methods exist since 2010. That
check can now safely be removed.

fixed constructor name for PHP7 compatibility

__construct()

label select field explicitly Fixes #126

Fix unittests

Add classes to datatable cells.

Fixes #88
Fixes #87

layout fiddling custom entry editor

Improve custom entry editor, use page width.

Should improve #142