Improve IDE comfort for DSL usage

Hi,

Trying to write the UI using the DSL builders (as mentioned here: https://kvision.gitbook.io/kvision-guide/part-1-fundamentals/ui-structure#dsl), the IDE (in my case IntelliJ) is not helping, because no auto-completion is showing up.

Looking in the source code, I realize that it is because all the extension functions for DSL builder are written in companion objects:

class HPanel {
    companion object {
        fun Container.hPanel(...): HPanel { ... }
    }
}

So, despite it is possible to use the DSL builders as shown in the doc, it needs imports such as:

import pl.treksoft.kvision.panel.HPanel.Companion.hPanel

And IntelliJ does not seem to be able to propose auto-completion for it.

I propose one of the following options:

1. Don’t write theses function in a companion object*
2. Document how to setup IntelliJ so that we can have good auto-completion
3. Publish an IntelliJ plugin

*I have to say, I don’t understand the reasoning behind putting them in the companion object, and I’d be interested to learn the rationale behind it.

[rjaros]

Released with 2.0.0-M3.

[rjaros]

It’s now or never. The 2.0 move is the only moment to do such breaking change. Let’s try.