Pasting filters into issue search field doesn't always recognize tokens

Summary

When pasting multiple filter criteria into the issue search field, some of them are not turned into tokens.

Steps to reproduce

• open issues
• paste label:~2fa label:~bug label:~2fa label:~bug label:~2fa label:~bug

What is the current bug behavior?

Only some labels are turned into tokens:

broken-filter-paste

Also all whitespace between the labels is moved to the end of the input.

What is the expected correct behavior?

• all labels are turned into tokens
• no trailing whitespace