Translations: reverted Arabic translation to r37531 by request of Mazen Neifer (current Arabic translation maintainer). Reason is poor quality/machine translation, which makes hard to use translated IDE.

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@41340 4005530d-fff6-0310-9dd1-cebe43e6787f
IDE: regenerated translations; updated Russian translation

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@41341 4005530d-fff6-0310-9dd1-cebe43e6787f