Imio.actionspanel

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- Whenever an error occurs in `ActionsPanelView.triggerTransition`, make sure
we get the error in the returned portal message and log the full traceback
in the Zope log.
[gbastien]

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- Fixed arrow used in message explaining when a transition is not triggerable.
[gbastien]
- Prevent double clicks when triggering a WF transition by disabling
the link for 2 seconds.
[gbastien]

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- Implement method `show` when using async like it is already the case when not
using async to know if viewlet must be shown.
[gbastien]
- Added `saveHasActions` call in actions_panel_add_content.pt.
[sgeulette]
- Fixed `actions_panel_arrows.pt` to display the arrows in a table so we avoid
icons being one under others when there is not enough place to display it,
actions have to be always on the same line.
[gbastien]

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- Fixed broken JS event on comment popup `Confirm` button to prevent default behavior,
this probably leads to action not triggered from time to time on `Firefox`.
[gbastien]

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- Fixed `ActionsPanelView.getTransitions` check on transitions to confirm
informations, do not consider that prefix of given transition to confirm is a
`meta_type` but consider it as a `class name` as with `dexterity`, the
`meta_type` is always the same an no more useable to discriminate content.
[gbastien]
- Added parameter `forceRedirectOnOwnDelete=False` to `ActionsPanelView.__call__`,
when deleting an element, by default if current context is a faceted,
the user is not redirected but the page is reloaded, if we are removing the
page that holds the faceted then we need to redirect.
[gbastien]
- In JS function `deleteElement`, set `async:true` for the XHR request.
[gbastien]
- Fixed bug in Firefox not executing the JS `triggerTransition` XHR request when
`async:true`, this was due to `preventDefaultClickTransition` not applied when
using the `async_actions_panel` in the viewlet displaying actions,
it was producing a `NS_BINDING_ERROR` because 2 click events were triggered.
[gbastien]
- When not using the `useIcons` mode (so when using viewlet displaying buttons),
if no action at all, do not return an empty HTML table, just return nothing.
This let's hide the entire viewlet when using the `async_actions_panel`.
[gbastien]

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- Fixed behavior of just reloading the faceted when deleting an element,
this was broken because behavior between JS and python code changed and the
user was redirected to the default dashboard.
[gbastien]