It would be cool to be able to specify once and for all what are the default icons we want in collection views and one-item views. In 1-item views, what i always begin with is remove the save button and only keep the save and close, then i have to add Save & New each time,... Would be cool to be able to specify this in the project's options.

Yes, took note.
Same as default date format and so on...

I will add this when I will rewrite the whole javascript builder.