Fix issues with runaway sizing of the canvas when rendering more complex things in egui

[9SMTM6]

See emilk/egui#4660

IDK why the default render doesn't trigger this. Or precisely how this fixes it. But it does.

[emilk]

The next release of egui will fix this: emilk/egui#4536

[9SMTM6]

Nice.

Now I'm not sure if there was an unintended interaction any longer. I do currently depend on the master branch of egui, so perhaps this was an unforseen interaction there ( I looked through the PR and from my understanding its author did not see something like this happening)? I thought I had also tested this behavior with the current stable release, but honestly I can guarantee that.

Anyways, this doesn't seem to cause any problems at this point, it still fixes the blurry text in some situations - from my understanding - and when updating egui this will retain the intended behavior. So we could merge this (after i remove my comment). Alternatively you fix this yourself, once the release is out, but I think doing so now might save others from my confusion.

[emilk]

I'll address this when I update to egui 0.28