void setHomeButton(Icon icon, Runnable callback) {
		if (!winMgr.hasStatusBar()) {
			return;
		}
		statusBar.setHomeButton(icon, () -> callback.run());
	}
Constructs a new root node for the given DockingWindowsManager.

@param mgr the DockingWindowsManager
@param toolName the name of the tool to be displayed in all the top-level windows.
@param images the frame icons
@param isModal true if modal
@param factory a factory for creating drop targets for this nodes windows; may be null
Ghidra/Framework/Docking/src/main/java/docking/RootNode.java