private void reloadDiff() {
		if (diffControl == null) {
			createDiff();
		}
		else {
			tool.clearStatusInfo();
			displayExecuteDiff();
		}
	}
Reload the marked differences in the diff panel.
Ghidra/Features/ProgramDiff/src/main/java/ghidra/app/plugin/core/diff/ProgramDiffPlugin.java