added showing full level and level set information for BDCFF levels

added showing full level and level set information for BDCFF levels

For level and level set information screens accessible from main menu,
only a subset of information is shown (story, remark and description
for level sets, remark and description for levels, as level stories
are already shown when starting the game).

Complete information (including name, author, date etc.) is shown only
from the info menu.