idea, help, and big thank !

[fabifabi]

First, big thanks!
People forget how programming with local iframe (or with a little proxy) can be amazing productive.
And another thank, because that's look good, and no programming people care it too much !!
So i have some idea, and on my free time,i can help:

1. a bit an issue: i really have problem (even reading many time your example) for make my buttons as i wish, and i never success to make appear a menu or easily add MY icone on title bar : the html is here,but always on display:none ....I think this point is important,so it should be more easy (an helper perhaps ?), or more documented.
2. less important,but grouping windows (means a split windows,as on left,i code,on rigth I see the result? something like that...) can be nice, and i am ok for help if u want,and we have time.
3. bit more important (for me !) the unit: you "force" px....I prefer %;but without fork, look bit hard. solution: if "no %,or rem,em" => put px,if not, copy directly what the user asked? fast to do i think...

Ok,as a coder, I like when my product is used,so let me show what i did for now :
https://www.pigere.fr/mtdeb.html

It a prototype of "operating system" for raspberry Pi (with nw.js)
As u can see, it is bit messy, i was playing to add editor (ace, json viewer, etc)
It also a prototype for my little langage (mt) for permit from a fast little text to generate GUI etc....All was begining 3 week ago, but bcos you,that's look not so bad !!!

I work actually (can be a part of your project, or just an use of your project) on make a factory like "format": "js" so the windows is ACE editor with JS setting or "file": "video.mp4" and the factory open a html5 video player,and play the video.

Thank you for all ! And i will be happy and proud if we can share idea on this project or other geek talk !