[IMP] improved UI for empty kanban(group_by)
[MERGE] merged with main web addons
[IMP] improvement for kanban card movement
[REF]add bootstrap modal window based, cleaned, refactored from trunk-ui-to-boostrap-modal branch
[FIX]forgot to open a dialog
[FIX]modal strict to bootstrap: no resize and only use 3 size, large-medium-small instead of changing width of modal
[FIX]remove draggable on modal window + clean up
[FIX]few cosmetic of code
[MERGE] Sync with trunk
[MERGE]change modal windows to only use bootstrap3
[MERGE][IMP] Kanban view: Better display of help message when there are no records, especially when displaying empty columns