[FIX] crm, hr: fix web_tip css selectors

Some selectors were broken by layout changes in
d822766296fed8f72d3168c675d4cf0b89e73f0c
[FIX] fix bouncing buttons (when no content)

i am aware that this is an interesting hack, and that i do not resize
correctly the $buttons after the bouncing effect, but at least, it
solves the problem.
[FIX] fixes modal window layout bugs (addon web)
[IMP] add a 'or' operator between custom filters (web)
[FIX] cursor: pointer when hovering on trash icon
[FIX] many small fixes to modal dialogs
[FIX] add missing description to action
[FIX] various fixes on modals
[FIX] fix database manager layout

it was hardcoded to the previous layout, so completely broken with
the css.  it now uses the current layout