Element modifiers don't work with components

Hi!

I can't figure out a way to use element modifiers with components.

This works:
```
.my-div{did-insert (action (perform this.realoadData)}
```

This doesn't:
```
= my-component{did-insert (action (perform this.realoadData)}
```

Also no way to use modifiers using multiline syntax, related issue: #335 

Thanks!