"Fit View" center focusing function

[jridev]

reposting this here as suggested by comfyanonymous/ComfyUI#8642 (comment)

"I could not find a topic relevant this, I know this is a minor quality of life improvement and not major.

When both "Queue" and "Bottom Panel" are open, the "Fit View" functions serves to center the selected node / groups, it calculates the center based on the size of the browser window rather than based on the actual visual area of the relative view which is the area in use, if you're someone who uses queue and bottom panel at the same time, it would be nice to have it center based on the actual visual view."