optgroup representation in .msdrop not toggled correct

[IZSkiSurfer]

In

multiple-select/src/MultipleSelect.js

Line 737 in a49dd44

this.$drop.find(`input[data-key=${row._key}]`).prop('checked', row.selected)

we need to also search for span[data-key=${row._key}] to toggle the optgroup representation as well.

And in

multiple-select/src/MultipleSelect.js

Line 233 in a49dd44

row.selected = !this.options.single && selectedCount && selectedCount ===

we must convert selectedCount to boolean.

so replace
row.selected = !this.options.single && selectedCount && selectedCount ===
with
row.selected = !this.options.single && !!selectedCount && selectedCount ===

Atm row.selected will be evalutated to 0 if selectedCount is 0 and if we use this value in

multiple-select/src/MultipleSelect.js

Lines 737 to 738 in a49dd44

	this.$drop.find(`input[data-key=${row._key}]`).prop('checked', row.selected)
	.closest('li').toggleClass('selected', row.selected)

to toggle the class (and change prop) the class "selected" will be toggled and not removed (see https://api.jquery.com/toggleclass/#toggleClass-className-state which clearly states that the state must be boolean - not truthy/falsy)