Using a window layout system

[endes0]

One of the major problems of the current UI is the fact that the "windows" of the simulators views are not movables nor hideables in any way. Also, they are one of the major issues of the responsiveness of the UI.

As commented by @oxcabe, we can use https://github.com/golden-layout/golden-layout as it provides just what we are searching. But as a con, it seems that the project is not being maintained.

We can also reinvent the wheel, with the help of https://github.com/haltu/muuri (which also seems unmaintained) or from scratch.

[oxcabe]

It would be fantastic to have a properly maintained and modern version built with custom elements or Lit in order to work with vanilla JavaScript. It's just too for what it's worth.

[oxcabe]

Golden Layout (version 1) is also used in godbolt.org, so we have that as a warranty.

See: https://github.com/compiler-explorer/compiler-explorer/blob/cbce8dfb8b15a44959fe8d3f35f8a9c5050e137a/package.json#L47