Imio.actionspanel

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- Message when deleting an element (delete_confirm_message) is now more
clear to specify that element will be deleted from the system definitively.
[gbastien]
- When a WorkflowException is raised during a WF transition, display the exception
message, this way a beforeTransition event may raise this exception and display
a particular message to the user.
[gbastien]

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- Use an onClick instead of the `href` on the actions rendered by the
`actions_panel_actions.pt` to be able to use a javascript method for
the action URL.
[gbastien]
- Use `async:false` for jQuery.ajax calls so the ajax loader image (spinner)
is displayed in IE and Chrome.
[gbastien]

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- Use `POST` as type of jQuery.ajax used to add a comment to a workflow
transition or it fails when the comment is too long.
[gbastien]

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- CSS for buttons displayed on the transition confirmation popup
[gbastien]

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- Make trigger transition and own delete aware of faceted navigation.
If the action is made in a faceted navigation, only the faceted page
is reloaded, not the entire page
[gbastien]
- Hide the Add menu if no addable content
[sgeulette]

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- Do not generate the image name to use for a transition but
use the actbox_icon defined on the transition
[gbastien]