Make it possible to disable automatic cursor advance after making an inline edit

[ECrosland]

I mentioned as a side note in bug report #2024 that I would like to prevent the behavior whereby, when enter is pressed to submit an inline edit, the "edit cursor" automatically advances to another editable cell and opens an inline editor for that cell.

I couldn't find an option whereby I might disable this behavior, so I attempted to introduce one. I've called the option advanceOnEdit, and it is set to true by default to preserve existing behavior. My code changes check this setting in two places; I'm not sure whether I've caught all necessary places where the check should be made, so please review.

[ECrosland]

FWIW, I have a workaround that seems to prevent this "auto-advance" behavior in a recent build of w2ui. It basically checks whether the event that leads to a w2ui editField event was triggered on a w2ui-input element. This feels a bit less than clear, but it does seem to successfully distinguish the case where editField is called on a subsequent cell in response to Enter being pressed in the editor for a previous one. Then I can simply cancel the event.

myGrid.on("editField", function (event) {
	// NB: Seems to only work when selectType is "row", which is OK for my needs.
	const isAutoAdvance = $(event.originalEvent.target).hasClass("w2ui-input");
	if(isAutoAdvance) {
		event.preventDefault();
	}
});

[vitmalina]

@ECrosland thank you for you contribution. I think it is a good feature. The only thing I am not sure advanceOnEdit is the best name. What about editAtuoAdvance - I like that it starts with edit as it will be grouped with similar properties/methods, such as editField.

Also, I noticed you pushed to master. Are you already using version of master in your dev? Nice, if it is so. Thought master is still buggy at times. But we are working on it.

[ECrosland]

@vitmalina Your thinking on the name makes sense to me.

As for my pushing to master--actually, it's just that I didn't really think it through. I'm still using 1.5 in my project, not 2.0, so, I guess it would be helpful to me to have the change on the 1.5 branch also.

[ECrosland]

Just created #2032 which adds the option on branch w2ui-1.5. This is the branch that the copy of w2ui in my latest project is built from.