### Bug report
When the virtualization is enabled, in some cases, the selected options in the dropdown do not match the selected options in the input.
### Reproduction of the problem
1) Create a MultiSelect with Virtualization (for example, the same configuration as in the online demo).
2) Select multiple options from the dropdown.
3) Enter a search entry in the input to filter the displayed options and select a specified option.
4) Scroll down and select another option.
5) Remove some of the already selected options through the input.
6) Open again the dropdown. The selected options in the input do not match the selected options in the dropdown.
A screencast for reproduction: https://app.screencast.com/v6GtyST0dQAnh
### Expected/desired behavior
Implement an AllowCustom option in the MultiSelect, which would make possible to select a custom value that is not present in the data.
This option is available in the Kendo UI for Angular MultiSelect:
https://www.telerik.com/kendo-angular-ui/components/dropdowns/api/multiselectcomponent#allowcustom
https://www.telerik.com/kendo-angular-ui/components/dropdowns/multiselect/custom-values
I'd like to utilize the MultiSelect's Columns as they are available in Kendo UI for jQuery.
Here is the Dojo I am referring to: https://dojo.telerik.com/@martin.tabakov@progress.com/avAvIPEM
Describe the bug
The selected items of the MultiSelect in the Bootstrap Urban theme have invisible text
To reproduce
Expected behavior
The selected item should have its text visible
**Affected package **
**Affected suites **
Affected browsers
The item is no longer highlighted as selected.
The item is highlighted as selected.