[PickerInput] 'Show only selected' toggle displays items in order of selection but not in alphabetical

# Prerequisites

- [ ] I am running the latest version
- [x] I checked the documentation and found no answer
- [x] I checked to make sure that this issue has not already been filed

## Steps to Reproduce

1. Open picker with items in alphabetical order
2. Select some items
3. Click on 'Show only selected' toggle

## Actual result

Selected items are displayed in order of selection

## Expected result

Selected items are displayed in alphabetical order

# Environment

* UUI version: 4.8.0
* Browser name: chrome
* Operating System: windows