emscripten rendering should keep the aspect ratio

[ypujante]

I built the example program example_emscripten_wgpu without any issue.

When I load it in my browser (Chrome), I noticed that as the window gets resized the ratio is not preserved, thus leading to a situation like this screenshot

Obviously this is an extreme scenario, but the reason why I am reporting it is because the first time I opened it in my browser, my browser was not 1280x720 and as a result, the text/font looked really bad. So it seems that something was broken with the build or rendering. Also, it is not really easy to make the browser window exactly 1280x720 to have no artifacts due to stretching.

Note that I cannot copy/paste the build info because "Copy to clipboard" does not seem to work in this environment.

It is the latest commit on the docking branch 83c433682883aaa6f9583a4a84d1ae4bd8d1e977 built on macOS (13.5.2) with emscripten

emcc (Emscripten gcc/clang-like replacement + linker emulating GNU ld) 3.1.45 (ef3e4e3b044de98e1811546e0bc605c65d3412f4)

This is the "about" window, with a more "normal" size, yet the font rendering does not look very good.

[ocornut]

I think this is covered by #6751

[ypujante]

When I get a chance I will try to apply the changes included in this other issue and report back. Thanks

[ypujante]

I confirm that the patch from #6751 fixes this issue.