MOB-1530

**DO NOT MERGE YET**
each event handler gets event object passed as argument. You can get data-type attribute from event target. With this you could create a simple function:
```JS
function setType(event) {
     mapTypeChosen = $(event.target).data('type');
}
```

with this the handler array could look like this:

```JS
chooseTileSet: [
    chooseTileSet,
    setType
]