Enhance Alert widget to select type using wildcard match

[klimov-paul]

At the present state Alert widget determines alert type (CSS class) using direct match of flash name:

[
        'error' => 'alert-danger',
        'danger' => 'alert-danger',
        'success' => 'alert-success',
        'info' => 'alert-info',
        'warning' => 'alert-warning'
    ]

Thus in case flash message named in non standard way, e.g. 'emailSendSuccess' or 'configUpdateError', they do not pickup any alert style.

Behavior should be changed allowing configuration via wildcards, e.g. 'Success', '*Error' and so on.

[klimov-paul]

Resolved by commit 951bb6d