Re-dded a div causing events not to show at the non-montly view

 * The div is the gradient one. Now is added, but empty, till the
   UI designer takes a look at this.
Added a border to a calendar event

 * Thus two consecutive events can be differentiated better
Removed old ckeditor
New ckeditor
Add category button is now translated
Composing mail body textarea now is shown

 * It wasn't shown when editing in plain text
Mail buttons are not shown when no email is selected

 * There is no need to show the reply, reply to all, fordward, delete
   or print buttons if there is no mail selected.
 * Those buttons share the "hiddenButton" class, which we use to hide and
   show them.
Contacts buttons are not shown when no contact is selected
Delete task/event button is only displayed when needed
Fixed mail list height

 * Message count is now properly shown, there was before a 27px gap
   at the bottom of the list (just above the preview panel)
folder tree style fix for proper clicking elements
new task status date picker fixed
date picker styles moved to generic.css
preferences vacation tab datepicker correction
Fixed filter section using updated version of the JS and WOX files
filter ui fixes
Fixed new task date input fields align
Show title in preferences and logoff buttons
icons update
"vacation message enable" icon updated & reload icon resized