Use unique database file names for poll result storage
|Reported by:||dietmarw||Owned by:||rjollos|
|Cc:||hasienda, jun66j5||Trac Release:||0.11|
Currently the PollMacro stores the poll results simply in a file named after the poll question text string. This leads to clashes if the same poll question is used in different tickets or wiki pages. Therefore, changing the file name convention by using unique identifiers (e.g., ticketnumber-question.poll, wikipagename-qestion.poll) would be a nice improvement.