Added indexing instruction relation to search instruction model

git-svn-id: https://svn.typo3.org/TYPO3v4/Extensions/esolr/trunk@81561 735d13b6-9817-0410-8766-e36946ffe9aa
Optimized relation display in search instructions

git-svn-id: https://svn.typo3.org/TYPO3v4/Extensions/esolr/trunk@81562 735d13b6-9817-0410-8766-e36946ffe9aa