When the actionmenu is open, we should focus on it's first element, and
then naturally tab through it. Tabbing from the end should take us to the
first element after the menu button. This may not be the same as the first
element after the menu itself because of the nature of primary and
secondary action links. We also need to shift-tab back in the same manner.
This fixes all sorts of bother with the fullscreen dialogues. It also means that
you don't lose your scroll position in the document when the full screen popup
opens/closes.
It prevents several bugs on mobile where the dialogue could get scrolled off
the page (and handles orientation changes better).
Contains one other tiny tweak to make the close button on the dialogue
a bit bigger so it's easier to click (only for fullscreen).
List of fixes:
* Add a simulated drag start event to fix problems with block drag and drop that
were expecting it.
* Add an access-hidden title for the General section in a course format. This
is used to provide the text for the drop region (better than the first activity in the section)
* Changed the text in the list to 'Move to "General"' instead of 'Move after General'. This
makes more sense for activities when you have a list of activities and sections together.
Items addressed
* Get rid of custom attribute srcNode
* Change extraClasses to a config only parameter.
* Change attribute fullscreen to a method.
* Restore the original window overflow value.
* Use setStyles instead of setStyle for performance.
* Tinymce end the zindex wars
* Prevent fullscreen dialogs in an iframe (tinymce managefiles plugin).
* tinymce: Cross browser fix for zindex on popups
* Use CSS for overflow changes (easier to keep track of the previous state).
* Fix Coding style for css changes
This change adds support to M.core.dialogue for showing fullscreen
dialogs on small screen sizes. There are 2 new configuration values that
can be set to control this when creating a dialog (responsive and responsiveWidth).
Setting responsive to false will disable this functionality completely (old behaviour).
Setting responsiveWidth controls the screen width that the dialog will switch to
fullscreen mode. Try not to think of the device that will be accessing the dialog,
but the width at which the content of the dialog needs to be displayed differently.
The activity chooser and the filepicker are the two dialogs that have been converted
in this patch. The filepicker first had to be converted to use M.core.dialog and not
Y.Panel.
