This is about whether to display a confirmation dialog before executing an action depending on it's type and location. This ticket should also serve as a reference point when implementing new actions.

We have 3 places where can be actions located: action list (drop down in page header), control buttons bar (bar under page title and navigation) and action panels (panel on the right side of a section).

After a talk with Dmitri, general idea is:

Show confirmation for:
1. Batch operations which are changing data like deleting/enabling/disabling of multiple items in search pages.
2. Actions which are changing data and are located in control buttons bar or action panel except 'Update' (besides batch actions in 1) there are none at the moment)

Don't show confirmation for:
1. Actions which are selected from action list. Selection of an item in the list can be considered as a confirmation itself.
2. 'Update' action in details pages. This wasn't in 2.2, is in 3.0. Can be easily removed.
3. Actions which are not changing data (refresh, reset)
4. Actions which are changing data but where exist a middle step which needs user's input eg: add, reset password, issue cert...

With current implementation it basically means to do following changes:
1. remove confirmation from update action
2. add confirmation for batch actions - this will be side effect of patch for #2977
3. reset action list to show '-- select action --' on page refresh. It forces user to select the action. Now it shows the last selected action even when item changes.
4. implement and use custom confirmation dialog. Using window.alert JS call is not consistent with the rest of the UI.

Notification of action success is a responsibility of #2977.

Comments are welcome.