Window panes not scrolling by page

[BowtieBob]

Environment

What version of MekHQ does your issue apply to? 0.47.17
What operating system are you using? Windows
What java version are you using? openjdk 11

Description

Some of the detail screens are able to scroll by page when you select the bar of the scroll bar (normal Windows behavior), but many of them only scroll one line at a time instead. This makes scrolling tedious when a mouse wheel is not available.
Here are the ones I have found so far that only scroll one line at a time:

TOE tab, Pilot and Unit detail tabs
Briefing Room tab, Mission list
Briefing Room tab, Scenario details
Interstellar Map tab, System details
Personnel tab, Personnel details
Hanger tab, Unit details

[BowtieBob]

Oddly enough, the Lance Deployment pane on the Briefing Room tab DOES work correctly when clicking on the scroll bar, but when scrolling using a mouse wheel, it only moves a fraction of a line at a time. This is the only pane I've noticed that scrolls that slowly when using a mouse wheel.

[sixlettervariables]

This is by design for most tables with scroll bars, per JTable's Scrollable interface implementation:

Returns the scroll increment (in pixels) that completely exposes one new row or column (depending on the orientation).
This method is called each time the user requests a unit scroll.

It may be possible to override this, but I'm not sure what a reasonable setting would be.

EDIT: Actually that appears to be a red herring. Most tables seem to work just fine. It appears to be the case when a JScrollPane envelops a JPanel.

[sixlettervariables]

We did it to ourselves:

mekhq/MekHQ/src/mekhq/gui/view/ScrollablePanel.java

Lines 45 to 51 in 65555bd

	public int getScrollableUnitIncrement(Rectangle visibleRect, int orientation, int direction) {
	return 16;
	}
	public int getScrollableBlockIncrement(Rectangle visibleRect, int orientation, int direction) {
	return 16;
	}