Several UI changes (mostly small). Commits can be reviewed individually for readability:

• Added Network measures to the Scheduling Profiler. Also slightly refactored the preprocessData data function to split separate sections out into helper functions for readability. (We can do more of this for other mark types in a follow up commit.)
• Slightly tweaked scroll event bubbling behavior. Don't allow wheel events to bubble past this view even if we've scrolled to the edge. It just feels bad to have the scrolling jump unexpectedly from in a container to the outer page. The only exception is when the container fits the content (no scrolling). Also don't prevent mouse move events from bubbling if dragging horizontally within a vertical scroll view or vertically within a horizontal scroll view.
• Text utils (draw and measure) performance improvements. Better handle the case of extremely long strings (which previously draw and measures by removing one character at a time) to instead use a binary search pattern of finding the biggest string that fits.
• Adjust Canvas borders (1px) to account for high-dpi devices. This is a small tweak, but it makes the profiler UI look crisper. (See video below.)