[FEATURE] Overwrite maximum number of Indexed Search results.

TypoScript setting
`plugin.tx_indexedsearch.settings.blind.numberOfResults`
receives a comma separated list of integer values. If number of results
sent in request does not match any value from this list,
default (first) value will be used to keep DoS attack protection.

Values from `plugin.tx_indexedsearch.settings.blind.numberOfResults`
are used as options in the select box in advanced search mode.
To keep backward compatibility default values are 10, 25, 50 and 100.

Releases: master
Resolves: #73626
Change-Id: Id85951450e6b8192d8c36e43a468f8db82d7a9f8
Reviewed-on: https://review.typo3.org/50110


Reviewed-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Tested-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>