Constrain resolution when fit called without duration

[M393]

Fixes #11560

[jahow]

Thanks a lot for proposing a fix. The changes makes sense to me. Do you think you can add a test that is failing without the fix, and passing with it?

[M393]

Some of the other View tests use a size of [200, 200], but here:

openlayers/src/ol/View.js

Lines 1714 to 1716 in 2de80e0

	getConstrainedResolution(targetResolution, opt_direction) {
	const direction = opt_direction || 0;
	const size = this.getViewportSize_(this.getRotation());

the default size ([100, 100]) is used regardless.
I have not investigated if this is a problem, just found it a bit strange.

[jahow]

Perfect, thanks a lot.