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Automatic coding style fixes

feat: let %lastupdated% refer to newest page rev

This reimplements 1f4dc0b95bed5d54071e0a290886bc9ed1ba1d32.
This time correctly extending the class DateTime which is actually used
in Search::findCo

feat: let %lastupdated% refer to newest page rev

This reimplements 1f4dc0b95bed5d54071e0a290886bc9ed1ba1d32.
This time correctly extending the class DateTime which is actually used
in Search::findColumn()

SPR-622

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Revert: "feat: let %lastupdated% refer to newest page rev"

This reverts commit 1f4dc0b95bed5d54071e0a290886bc9ed1ba1d32.

We need to modify the DateTime type, not the date type.

refactor: Use more specific typehint

feat: let %lastupdated% refer to newest page rev

Implement `%lastupdated%` as it was originally meant to be. The
information when the struct data was last updated is much less important
then when th

feat: let %lastupdated% refer to newest page rev

Implement `%lastupdated%` as it was originally meant to be. The
information when the struct data was last updated is much less important
then when the page was last changed. (This includes updates to the
struct data only).

SPR-622

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fixed problem with multicolumns and made the param name clearer

implement a %lastupdated% column #122