Fix image property on Action.js
Fix image property on Action.js

This image was no longer encoded, breaking the existing launcher app
(among other). This is only a quickfix, I will refactor the property
encoding very soon anyway.

Change-Id: I56a5525e0a6b5fc06c235d611df0faea5c5b7346

eclipsesource/tabris-js,moham3d/tabris-js,softnep0531/tabrisjs,eclipsesource/tabris-js,eclipsesource/tabris-js,pimaxdev/tabris,mkostikov/tabris-js,moham3d/tabris-js,mkostikov/tabris-js,pimaxdev/tabris,softnep0531/tabrisjs