fixed bug #2189 with CMF toolbar

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Fixed tickets | #2189
| License       | MIT
| Doc PR        | no
toolbar has position absolute, so i decided to make it translucent as it has been conceived.
example http://createjs.org/demo/hallo/