RCP: 0.7.7, update R packages window of Ubuntu installation setup process

• add ‘Option - install needed R packages…’ ->‘Optional - install R packages needed…’

MD : OK Linux64

(from redmine: issue id 1190, created on 2014/12/12 by Serge Heiden)

assigned to @project_3134_bot_c287846fb4704c83fd27510cd997e5a9

added setup type::bug + 1 deleted label

changed milestone to %TXM 0.7.7

closed

assigned to @mdecorde and unassigned @project_3134_bot_c287846fb4704c83fd27510cd997e5a9