[OBM Admin] [OpenBioMaps/documentation] eaf2a8: add text_filter and text_filter2 description

[szofett]

  Branch: refs/heads/master
  Home:   https://github.com/OpenBioMaps/documentation
  Commit: eaf2a8f20876d2cde888265be98a7e786e7c663d
      https://github.com/OpenBioMaps/documentation/commit/eaf2a8f20876d2cde888265be98a7e786e7c663d
  Author: szofett <hylidae91 at gmail.com>
  Date:   2020-02-17 (Mon, 17 Feb 2020)

  Changed paths:
    M official_docs/hu/modules.rst

  Log Message:
  -----------
  add text_filter and text_filter2 description