[FIX] improvements to modal windows (web client)

problem is that they sometimes collapse to a single line, making it
difficult to operate the search view. Other problem is that content is
not displayed sometimes (when sub view manager).  Other problem is that
it does not have a scrollbar.  Sidenote: modals will be properly
reworked soon (tm).
[FIX] css fixes: oe_mail size, and link color
[FIX] fix display issue in safari

safari needs to use css rules prefixed with -webkit-
[IMP] add warning when removing non global favorite
[FIX] various layout fixes for web client

* fallback support for browser without calc,
* invisible pager in some cases
* correct colors for oe_stars
* readd oe_webclient class
[FIX] fix bouncing problem on create/import buttons

the bouncing is supposed to occur when clicking on the area in view list
with no content.  Problem was that the Create button was separated from
the import button while bouncing.  This commit fixes the issue in a not
really subtle way: it instead bounces the whole row.  I tried to find a
better fix, but I don't like jqueryui and i don't want to spend too much
time on this.
[FIX] fixes an issue with non-displayed favorite filter

If someone removes the last filter in favorites menu, it removed the
divider, and therefore couldn't properly add a new filter.
[FIX] correct a layout issue in viewmanager (webclient)

problem was that the pager was not displayed/hidden at the correct moment
Result is that when switching views, the header sometimes takes an extra
line.  The pager is now hidden just before creating the view