[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.
[IMP] add a 'or' operator between custom filters (web)
[FIX] cursor: pointer when hovering on trash icon
[FIX] add missing description to action
[FIX] fixes modal window layout bugs (addon web)
[FIX] fix database manager layout

it was hardcoded to the previous layout, so completely broken with
the css.  it now uses the current layout
[FIX] add missing descriptions to many fields
[FIX] various layout fixes for searchview related issues

include modal dialog fixes, css issues in searchview, missing
field description, ...

Merge branch 'master-searchview-fixes-ged'
Merge branch 'master' of https://github.com/odoo/odoo into master-linux64