added back id for wrapper div
completed search table
apply basic style & tooltips for insFbResultsByTable
completed moreOptionsDiv
apply BS to insFbResultsByTable
minor change in thead naming
minor changes:
1. in insFbResultsTop. edit link now is next to session name
2. in insFbResultsByTable, add table for stu who don't submit any response
almost done, minor clarifications needed
Merge branch 'bootstrap' of https://github.com/TEAMMATES/repo into Issue2052