WOW! Finally.... Thank you!
I have one question: is it possible to place objects/items bigger than 1x1 at once?
Hey ! :)
Yes, it is, there is a "Shape" plugin command parameter which let you define the size of what you want to build (I.E. 2x3 for a two-height and three-wide rectangle of tiles.)
What will be drawn in that case is currently, however, defined by what you have in your tileset. So you can't build, for example, a big rectangle of the same tile at once. Unless you have a big rectangle of the same tile in your tileset.
But I plan to add a completely custom shape feature which let your draw exactly what you want without having to edit your tileset very soon. It will be, actually, the next update I will push. :)