Control stack flags

anonymous

Supported from 5.0

Control stack flags. Each control on the stack also has a set of flags, which can be used to refuse key events and requests for focus.

`ECoeStackFlagStandard`	The default value
`ECoeStackFlagRefusesAllKeys`	The control does not accept key events.
`ECoeStackFlagRefusesFocus`	The control does not accept keyboard focus.
`ECoeStackFlagOwnershipTransfered`	The control is owned and deleted by the stack.
`ECoeStackFlagSharable`	The control is also added to the stack of any embedded appUi. For example, an alert dialog added through `CEikonEnv` will be shared on the stack of all embedded appUis that may appear in the application.

Enum anonymous