🐛 Autocomplete select all: consider disabled items

[oddvernes]

resolves #3427

changes

• moved defaultValue of optionDisabled to an external const so it does not break useMemo's where it is a dependency
• "select all" now only selects/unselects items that are not disabled
• "clear" button only unselects all selected items that are not disabled
• "x/y selected" text - changed y from "all not disabled items length" to "all items length" (due to the fact that disabled items can still have selected state)

[torleifhalseth]

LGTM

[oddvernes]

I have now taken into account that a disabled item can be selected, and the "select all" toggle will only select/deselect items that are not disabled. I also made a change to the "x / y selected" text, where y used to be all items length - disabled items length, is now changed to all items length
But this also made me realize that our "clear all" button, the "x" in the input, clears disabled items as well if they are selected. So I have made a change there as well so "clear" only clears non-disabled items.