[IMP] Improved code according to the changes of bootstrap3 in web.
[FIX] Fixed the issue of positioning of signin icon in navbar,
[IMP]improved css for sales team kanban, sale order payment_acquirers and attach file button.
[MERGE]with latest.
[IMP]improved css for survey kanban, file attach button and my current timesheet in hr.
[IMP]improved css for pos screen header.
[MERGE]with latest.
[IMP]improved css for base_import, mass_mailing and idea module.
[IMP]improved css of base_import module for dd, label and p tags.
[MERGE]with latest.
[MERGE] bootstrap3