CheckedMultiSelect new feature proposal

[twry]

This applies to the dropdown version only.

I propose the following new features for CheckedMultiSelect?:

• add a configuration option that allows an item to be declared as the one to check / uncheck all other items. This way, the user does not have to click all items if he wants to check / uncheck all of them.
• add a configuration option that causes the widget to display the values of the items that are selected when it is collapsed. By default, it displays how many are selected.
• add a configuration option that specifies the string to be displayed when the widget is collapsed an no item is selected, e.g. "Select an item"

[Becca Stewart]

Can I add another CheckedMultiSelect? enhancement proposal to this?

• FilteringSelect? type-ahead filtering (like ​what Jira has to filter their search results).

[dylan]

Given that no one has shown interest in creating a patch in the past 2+ years, I'm closing this as patchwelcome.