fix(FilePickerBuilder): correctly return array / plain value depending on multiselect

[susnux]

• Resolves pick() always will return an array even for multiselect === true even if the TypeScript typing is tuned to claim this different. #1773

[susnux]

/backport to stable6

[rotdrop]

The changed line 101 contains a duplicated check for "multiselect". I suppose this is not intentional?

[susnux]

The changed line 101 contains a duplicated check for "multiselect". I suppose this is not intentional?

Not sure what you mean?

[rotdrop]

The changed line 101 contains a duplicated check for "multiselect". I suppose this is not intentional?

Not sure what you mean?

Line 101 after applying your commit:

return nodes.map((node) => node.path) as (IsMultiSelect extends true ? string[] : string)

This is already in the code path where multiselect is true. Ok. I suppose this is still needed in order to persuade TypeScript to deduce the correct return type ...