Improve Hungarian translations in DSpace 9.0 (#4506)

* QREPO-0 improving HU translations

* QREPO-0 improving HU translations

* QREPO-0 HU translations: grant-request-copy messages

* QREPO-0 improving HU translations

* QREPO-0 HU translation improvements

* QREPO-0 HU translation improvements

* QREPO-0 HU translation improvements

* QREPO-0 HU translation improvements

* QREPO-0 HU translations improvements

* QREPO-0 HU translation improvements

* QREPO-0 HU translation improvements

* QREPO-0 removing TODO comments

* QREPO-0 inserting some missing new lines

* QREPO-0 HU translation improvements

Author: kanasznagyzoltan