No wait cursor on CSL navigator expand

[lkishalmi]

Well, I find it a bit annoying, that almost every time I edit a Yaml, HCL file, there is a flickering on the mouse cursor changing to wait cursor and then back.

It turned out that is because the navigator is expanding it's tree to the current location, so when the structure changes it issues an expand and the TreeView.autoWaitCursor is true by default and put the cursor in wait mode for a brief moment.

That led me to try other parts of the IDE, and expanding nodes could result with a brief mouse cursor change. That made me think to change the TreeView behavior. It would be good to have the default for the wait cursor to be false, though since it is down in the core I think it's being used many places outside of NetBeans.

Probably the best would be delaying the wait cursor change by 500ms or so, and if the tree could expand it in that time we just do not do that. Might try to create a PR for that one, however for the default CSL provided navigator, I do not thing that we need the autoWaitCursor functionality at all.

[mbien]

nothing against this but we should try to keep functionality in sync across the codebase.

the java navigator has the same disable/enable trick in the refresh method:

netbeans/java/java.navigation/src/org/netbeans/modules/java/navigation/ClassMemberPanelUI.java

Lines 427 to 429 in b2bdb81

	elementView.setAutoWaitCursor(false);
	elementView.expandAll();
	elementView.setAutoWaitCursor(true);

(there are no other usages looks like)

I think I can see the cursor change for a split second when I toggle collapse/expand in the java navigator.

Disabling the cursor change should be fine UX-wise, since the tree itself has a please-wait placeholder node for situations where it takes longer until the file structure is available.