Selection list gets freeze on blur if you input random value, which is not equal any option

[IraErshova]

1. What is the expected behavior?

Selection list continues working. You can open/close options

2. What is the current behavior?

Selection list gets freeze on blur if you input random value, which is not equal any option

3. What are the steps to reproduce?

1. Go to demo SelectionList w/complex object (allowMultiple)
2. Select several options from the list
3. Enter random values until the list of options is empty
4. Click outside the input

Providing a reproduction is the best way to share your issue.

a) Fork our starter repo: https://github.com/GetTerminus/ui-stackblitz-starter
b) Replicate your issue.
c) Add a link to your replication or attach a zip of your project to this issue.
d) Outline any steps needed to reproduce the issue.

4. Which versions of this library, Angular, TypeScript, & browsers are affected?

• UI Library: 15.8.3
• Angular: 8..
• TypeScript: 3.4.5
• Browser(s): Chrome

5. Is there anything else we should know?